Powershell Not Equal Null

And because PowerShell emphasizes consistency, it uses analogous syntax for other comparison operators. But sometimes you just need to test to see if they are available or not. Agree or not, according Bruce the PowerShell's consistency would be broken. here problem is it executes every time when you add/update any items to this Library. The Count property has [ValidateRange()] attribute that dictates that any value must be between 1 and 20. VBScript Select Case: Creation. Windows Management Instrumentation (WMI) is the Microsoft implementation of WBEM, an industry initiative that attempts to facilitate system and network administration. Variable in PowerShell in reality are units of memory where we store values. These VMs should not be controlled by our IT department so I cannot use tools like Config Manager. It makes generic commands, like Get-Item, Sort-Object, and Set-Content function like true reusable parts, so custom commands never need to create them. LIKE is used to test character matching and use the following [ ] Any one character within the specified range ([a=f]) or set ([abcdef]). Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Here is how you can verify whether an external command in PowerShell was executed successfully or not by its errorlevel. To see if a variable is null, simply check:. Figure 4: Format Shape Task Pane Within the Format Shape Task Pane you'll find three radio buttons. Orchestrator's built-in schedule activity supports two options:. The example shows you a floating point zero, a hexadecimal zero, 0 megs, 0 kilos, 0 decimal, there are all sorts of zeros but to PowerShell, they all evaluate to FALSE. Ternary Operator support in Powershell Takes advantage of the fact that PowerShell returns any uncaptured output. In this post, I will show you how to verify if a string is empty, null or having white spaces using Powershell. I'm having issues with this powershell script below. Variables are just about the most ubiquitous element inside any PowerShell script. All other languages have comparison operators but not quite like PowerShell. I’m having a bit of trouble with this function. At their most basic, comparison operators are used to compare values and return either a boolean True or False value. txt "The End" By default, data is. I can usually put some snipits together and come up with a program that does something good. First, ISNULL function will check whether the parameter value is NULL or not. 2011 by ITNotes I had a hard time finding examples on the web on how or if you could code multiple If’s into a single If statement, so I thought I would just quick post up an example once I figured out how to do it. Posts about Get-MsolGroup written by nadavsol. You can remove this condition if you wish to run the script on all items in the list. CloudWatch Logs. By default this attribute is not set but we have an app that modifies this attribute (to contain a hexadecimal string), so I'm looking for a list of all users that have. Explore Privilege access manager Jobs Posted by Top Companies in your City. Laptops are cool for some scripting on the go. Create the following PowerShell SharePoint") | Out-Null an IF statement to where it will only run and update if the date is not equal to Saturday or Sunday. PowerShell uses the equal sign for assignment, like the latter example. Syntax Out-Null [-inputObject psobject] [CommonParameters] Key -inputObject psobject The object that will be sent to null (deleted). I'm looking for a script/Powershell command that will list all AD users that have a value not NULL in the teletexterminalidentifier attribute, so they must have a value set. PowerShell Check for Empty SecureString Entry January 4, 2012 Brian T. com fame and. I wanted to find out which Active Directory Computer accounts were obsolete or have never been used and then move them into a different Organisational Unit to clean things up a little. To accomplish this, I created a quick PowerShell function to null route the traffic (send it to an invalid/null next hop). PowerShell の演算子とキーワード 文字列の比較はデフォルトで大文字小文字を区別しない。 明示的に区別する場合は、比較演算子の前に c をつける(例: -ceq). SomeCmdLet #does not exists $? $? Output. Only one result will have a value, but I'm struggling to select it without losing the variable type. In contrast to strongly typed languages such as C#, C++ or Java this means that the type of the variable does not need to be specified at creation time. -ge Greater than or equal to. Getting it Pestered. Thus, it makes sense that null does not strictly equal undefined. It retrieves all users that have a value assigned to the City property, and the value is not exactly equal to "London". This chat between Scott of Hanselminutes. Pester is a community-driven BDD Unit Test framework for PowerShell. You can use the PowerShell add-content cmdlet to append data to a text file. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Powershell can't count 0 or 1. Just because an index is available to the Query Optimizer does not mean it will always be used. One thing you may not forget is that Powershell is a lot more friendly for NULL values than C#, so don’t forget to check your objects for NULL values. -match Uses regular expressions. Checking if a string is NULL or EMPTY is very common requirement in Powershell script. # re: T-SQL not equal WHERE condition excludes records with null values. Powershell is a really powerful scripting language. Check if a string is not NULL or EMPTY. Командна оболонка [. Prevention is the best medicine, or so they say. function Test-Boolean { <#. Constructing SCCM Rules with PowerShell examples of using PowerShell to construct rules on SCCM Deployment Types. Test web server SSL/TLS protocol support with PowerShell Recently I was tasked to configure SSL/TLS protocols and cipher suites for internal web servers via Group Policy. In this article, we'll use PowerShell to add multiple attributes to this that aren't available in the GUI. Working with Azure Storage Tables from PowerShell January 18, 2017 September 28, 2017 / Scott Azure Storage Tables is one of the four Microsoft Azure Storage abstractions available (Blobs, Queues and Azure Files are the other ones) at the time that this blog was written. This chat between Scott of Hanselminutes. These code samples assume you have configured AWS Credentials and a default AWS Region. In this post, I will show you how to verify if a string is empty, null or having white spaces using Powershell. If you think you need to wait for a DBA to give you data from a SQL database then you’d be wrong. Description This function tests a string for type and equality without the implicit conversions and filtering semantics of the PowerShell comparison operators. Once you get used to Powershell, you will want to do more and more with it. ) % Any string of 0 (zero) or more characters. Remember that this test will return true if the values tested are not equal to each other. If it returns something else, Configuration Manager interprets that as the application is not detected. If you think you need to wait for a DBA to give you data from a SQL database then you'd be wrong. I am trying to help a collegue prevent "(Empty)" from being listed in his text-area's embedded filter. I wanted to post some notes I threw together for reference that someone else may find helpful. If you enter a value outside of that range, PowerShell will throw an exception and the script will not run. So PowerShell uses -gt and -lt instead of > and <. If you use it incorrectly in an if statement, it may lead to unwanted results if a variable is on the left side of the statement:. Sharepoint 2010: Folder Modified Date doesn't get updated below is the code to update folder "ModifiedDate" when a new item is added or updated to the document library. com fame and. Blog of Thomas Maurer - Microsoft Cloud Advocate - Focusing on Cloud Computing and Datacenter, especially Microsoft Azure, Windows Server, Container, Windows10, PowerShell and more. Read more about the patterns here. String type that is a null reference and is not // the empty string. But, and this may surprise you, null loosely equals undefined. Comparison operators let you specify conditions for comparing values and finding values that match specified patterns. Checking if a string is NULL or EMPTY is very common requirement in Powershell script. The argument is null or empty. #region header ##### #. Only mailboxes with an empty CustomAttribute7 field or one that was not spelt correctly should be returned so that they could be proactively remediated. Once you get used to Powershell, you will want to do more and more with it. TargetAddress, ExternalEmailAddress and Set As External Posted on April 28, 2012 by Michel de Rooij In co-existence scenarios, the targetAddress attribute is leveraged to accomplish routing to different Exchange organizations by specifying the “final destination” e-mail address. -ne Not equal to. While Techstravaganza is typically an IT pro conference, our PowerShell track does not always conform to that. We will see that do to the the unique way that PowerShell treats everything as an object variables are treated like so. Special note: When comparing text strings, by default PowerShell is not case-sensitive. Choosing NULL as your license plate might seem like a funny idea. In Powershell this is very clean and easy to do. 10 (2018-07-30) - in "Add/Edit favorite" for Windows Apps, add the "Ccustom Windows App" item to the drop down list of installed Windows Apps (allowing user to add app not collected by the PowerShell script, if any) - for custom Windows Apps, display location text box for custom app code (AUMID); internally prefix custom. Testing for the opposite, not equal, is very similar. Strings can be anything. The other thing that’s missing from a PowerShell is a null-coalescing operator. You are painting an image with the Brush tool. Combining and Negating Conditions with AND, OR, and NOT. In this tutorial we will look syntax and use cases of If. Once you get used to Powershell, you will want to do more and more with it. The -split operator takes a regular expression, and to split on an arbitrary amount of whitespace, you can use the regexp "\s+". The idea is nice but the problem with this implementation is that by default, powershell scripts are not allowed to run. Use a PowerShell script to start the workflow. Simply by verifying PowerShell’s return value, or exit code… Powershell $? operator The PowerShell operator $? contains True if the last operation succeeded and False otherwise. As you advance in your PowerShell understanding and knowledge, it's inevitable you're going to run into a number of core computer programming concepts. But as an infosec researcher discovered recently, the cool-looking NULL vanity plate comes with its own consequences. If another position of the array had been assigned, for example at position 5, the array would have been automatically redimensioned with a size of 6 elements at least, if its former size were null or less than 6 items. The IS NULL operator returns TRUE if a value is NULL. The following method is used to check if a string is NULL or empty. Just because an index is available to the Query Optimizer does not mean it will always be used. Back in 2009, Microsoft’s Group Policy team posted a PowerShell script that lets you find specific group policy settings. SetFocus Except in your code you need to surround the name of the control with quotes. com, one of the Largest Job Portal in USA. Chocolatey is software management automation for Windows that wraps installers, executables, zips, and scripts into compiled packages. Get-ADComputer does not provide any parameter that allows you to specifically collect stale computer accounts; however, it does feature a “-Filter” switch, which lets you specify a criterion. you can find information about the session here. Note: You can not use the comparison operator contains to check the contains string, because it's designed to tell you if a collection of objects includes ('contains') a particular object. If the left hand side of the operator is an array and the right hand side is a scalar, the not equivalent values of the left hand side will. For example, to count the number of events of a given type in the code below: library(plyr) events. Filtering XML Child Elements in PowerShell September 28, 2012 powershell powershell Jonathan Medd Recently I was working with some XML documents along the lines of the following. By Steve Seguis. net 01-Nov-19 10:53 AM?. I know I'm going to be kicking myself, but since I still consider myself a n00b with PS, I'll try not to kick too hard. Working in PowerShell, there will be times that you need to perform some sort of comparison to determine what kind of action should take place. Even if you only script every now and then, PowerShell logical operators will sooner or later cross your path. Kinda ugly, but maybe dump the whole set of users into a variable and then you can evaluate with Where-Object. When you compare two nonnull expression and left hand operand is not equal to right hand operator then the result is TRUE and both operands are equal then result is FALSE. net can anyone please tell me the symbol used for not equal to operation in vb. To see if two numeric values are not equal to each other, we use the comparison operator !=. I've noticed that in powershell, if I run a foreach loop over a null valued expression, the loop runs at least once. If a string is ZERO length – it is false, otherwise it is TRUE. WriteLine (x); // Assign the empty string literal to s. Countif not equal to zero Hello, I've been playing around with COUNTIF and I'm having trouble getting it to count all instances in a column where the value is not equal to zero. I think I figured it out. Of course, it never hurts to escape any character. Description This function tests a Boolean for type and equality without the implicit conversions or filtering semantics of the PowerShell comparison operators. So you see "No errors" on the screen, but nothing goes into the pipeline. In this post, I will show you how to verify if a string is empty, null or having white spaces using Powershell. Allerdings orientiert sich Microsoft damit nicht an populären Sprachen aus dem Web- und Windows-Umfeld. Task 1: See if a powershell cmdlet exists in the system. Researcher Droogie, that's his handle, who presented at this year's DEF CON in Las Vegas, said he has been on the re. You need to provide a full scriptblock with braces for it to work correctly. Check Email forwarding using Powershell !!! Being a system admin is not only about the doing the Job but doing it efficiently. Not Equal to operator compares two expressions. If they are equal, this portion of the script does nothing, allowing the function to be dot-sourced into the current session without invoking it. Returning an exit code from a PowerShell script seems easy… but it isn't that obvious. CloudWatch Logs. Luckily, PowerShell gives us a few different ways to make that happen. Laptops are cool for some scripting on the go. If we don’t do that we will end up with run time errors if we try to perform some operation on that string variable which is empty or null. edit: Another way to make selection of multi-value parameters easier is to stop using the default 'Report Manager' ui and use something else instead. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Powershell: Working with CSV Files Today I'm going to talk about interacting with CSV files using powershell. We will see that do to the the unique way that PowerShell treats everything as an object variables are treated like so. Assuming we are going to use the query above, you would put it into a. XPath query examples and code syntax of how to use selectSingleNode to query by node text value or attribute value including substrings. Using Powershell to automate Windows administration tasks is a fairly common thing. This article will not cover the ins and outs of jobs and it expects the user has some basic knowledge of the jobs mechanism in PowerShell. Chocolatey integrates w/SCCM, Puppet, Chef, etc. Can you shed some light on to why the uncommented bottom if -or statement works while the commented statement does not?. In this example, the result is a null value. ^ Any one character not within the range ([^a=f]) or set ([^abcdef]. Combining and Negating Conditions with AND, OR, and NOT. Running XMLA Queries the Powershell way. Here is an example not of -lt, but -le meaning less than or equal. Even so, the point I want to make in this article is still very valid, and my point is, is that not all indexes are equal. But now I know exactly how it works and there's a few loopholes where it may not trigger, and they're not the documented ones you're thinking of. Checking if a string is NULL or EMPTY is very common requirement in Powershell script. Note: You can not use the comparison operator contains to check the contains string, because it's designed to tell you if a collection of objects includes ('contains') a particular object. We'll be focusing on a two topics:. And not skipping a null value for a property that we would have skipped if it were non-null would change the functionality when compared to a non-null property. Using Powershell to automate Windows administration tasks is a fairly common thing. In PowerShell if you want to evaluate to values, use –eq instead like I did above. Powershell. -notlike Returns true when wildcard pattern does not match. 2011 by ITNotes I had a hard time finding examples on the web on how or if you could code multiple If’s into a single If statement, so I thought I would just quick post up an example once I figured out how to do it. UPDATE [dbo]. Sharepoint 2010: Folder Modified Date doesn't get updated below is the code to update folder "ModifiedDate" when a new item is added or updated to the document library. Powershell: check variable for null - Thomas Maurer. A value cannot equal NULL. Note that this is different from the EQUAL comparison operator (=), which treats NULLs as unknown values. When reviewing the operators listed below, keep in mind that all of them can be negated by putting the word "Not" between "Should" and the operator. For more details on the CAML query schema, you can go here. Synopsis An alternative to PowerShell's comparison operators when testing Booleans in unit testing scenarios. The null literal. PowerShell Check for Empty SecureString Entry January 4, 2012 Brian T. You can use CAML query to get the filtered, grouped or sorted data from SharePoint list. This method tests an entire string. net 01-Nov-19 10:53 AM?. it updates all, in case if you have more than one level of folder structure. Use a PowerShell script to start the workflow. I work with servers and powershell a lot. Also, you should understand that string is not an array of character or whatever, it is not an array at all. A -eq B will give false ne (not equals) Compares two values to be not equal. Get current value of a point. Computer understand the language of 0's and 1's called binary language. PowerShell Check for Empty SecureString Entry January 4, 2012 Brian T. For some reason it does not catch all errors, but most of the time it works. It returns true if the string contains only whitespace characters or is null. Blog of Thomas Maurer - Microsoft Cloud Advocate - Focusing on Cloud Computing and Datacenter, especially Microsoft Azure, Windows Server, Container, Windows10, PowerShell and more. Ternary Operator support in Powershell Takes advantage of the fact that PowerShell returns any uncaptured output. PowerShell includes the following comparison operators:. You cannot use the comparison operator equal to (=) to compare a value to a NULL value. 30319_64 Not equal to 0. The PowerShell if statement enables you to branch your code depending in the results of one or more conditional tests. This is a guide for Configuration Item and Powershell, if you are new to Configuration Item and baselines i recommend you look at my previous blog post that's more of a overview and in this post i will go more in to depth on Powershell discovery and remediation with String compliance rule. … never talk about PowerShell scoping rules. If another position of the array had been assigned, for example at position 5, the array would have been automatically redimensioned with a size of 6 elements at least, if its former size were null or less than 6 items. Change the site and workflow names to suit your requirements. Look at the below example where PowerShell -eq operator is used to determine if the user has entered correct PIN number or not. Peter van der Woude created an excellent PowerShell script and blog post to dynamically deploy applications to computers via a Task Sequence within ConfigMgr. {may be piped} A command, expression or variable that contains the objects. Execute it in Windows PowerShell. SomeCmdLet #does not exists $? $? Output. The tests can be anything you need but must produce a boolean – true/false – result. Returns null on. At a client recently, I was tasked with implementing this script. Powershell. Azure Logic App - Evaluating IF condition with the help of JSON expression by passing null - Kloud Blog 5 / 5 ( 1 vote ) Introduction Yes, you read the title right, this blog is about evaluating IF condition. I was actually excited enough to post a thought 😉 I actually do have some questions for you if you do not mind. How can i find AD user witch email address not equal UPN? I try Get-ADUser -Filter { mail -notlike "UserPrincipalName" } but reasults are strange :. If you are an advanced DBA, you will probably have already noticed that I have oversimplified this discussion. -gt (Greater than), -ge (Greater than or equal to), -eq (Equal to), -ne (Not equal to). 'TaskName' equal to ''. I can usually put some snipits together and come up with a program that does something good. So I'm working with Powershell trying to query TPM data from computer objects. For our purpose, we can process the properties list and filter out those who have a Value of null. For example:. Pre = Not Equal In Progress Or IS NULL Post = Equal In Progress Maybe there needs to be a check within the code to confirm it can grab the ticket, maybe a loop with a delay to try 5 times that'd explain the "System. PowerShell uses backquote as the escape character. Powershell script to display unique permissions for all… Using Export-SPWeb to export libraries / lists; Using Get-SPLogEvent to retrieve logs based on correlation… Event 6398 and 5586 SharePoint Foundation; Start a workflow using PowerShell; Re-assign a workflow task that is not assigned to you. "A string of zero length ('') is not equivalent to a NULL value. However, if SQL*Loader does not find the matching directory object, it attempts to create a temporary directory object. Just because an index is available to the Query Optimizer does not mean it will always be used. This is despite the fact that when PowerShell retrieves a Distinguished Name that includes the "#" character, it is escaped with the backslash character. CAML querry to check for not null date fields SharePoint Use this forum to discuss topics about using Visual Studio with SharePoint and other programming for versions of SharePoint prior to 2010. Tip See the sections " Logical Operators " and " Comparison Operators " for a discussion on how PowerShell evaluates expressions as conditions. If you're coming to Dattocon feel free to join my session. This how you use it. This is the code:. If the left hand side of the operator is an array and the right hand side is a scalar, the not equivalent values of the left hand side will. Powershell can't count 0 or 1. No two NULL values are equal. We can use the powershell's like operator with wildcard character to check if a string contains a word or another string with case-sensitive and case-insensitive. Comparison Operators -eq (equal to) -gt (greater than) -lt (less than) -le (less than or equal to) -ge (greater than or equal to) -ne (not equal to) Logical operators -not -or -and If…else conditional statement in PowerShell. PowerShell includes the following comparison operators:. For some reason it does not catch all errors, but most of the time it works. May 21, 2012. The function is NULL-safe, meaning it treats NULLs as known values for comparing equality. For example, the following queries are valid: SELECT * FROM Win32_LogicalDisk WHERE FileSystem IS NULL SELECT * FROM Win32_LogicalDisk WHERE FileSystem IS NOT NULL. As you have seen, you could as well have skipped the assignment, and left it to PowerShell to set the null value. Splitting on Whitespace Using the PowerShell -split Operator. So, for example, it uses -eq and -ne rather than == and != to test for whether two objects are equal or not equal. We'll use an example key HKLM:\SOFTWARE\TestSoftware with a single value Version: Check for the key. Laptops are cool for some scripting on the go. During that process, you may need to deal with automatic variables, comparison operators, COM and. In this tutorial we will look syntax and use cases of If. (Get-ADUser-Filter {City -ne "London"}). It’s not the only project getting the Pester treatment, but it’s the first to have Pester in place from day one. PowerShell uses backquote as the escape character. Learn how Scott Hanselman and the Corillian Corporation leverage Windows PowerShell to simplify and automate financial application management. Once you have mastered the basic 'If' statement, you just need to acquire the knack of extending the logic to embrace the PowerShell 'If not equal' syntax. While Techstravaganza is typically an IT pro conference, our PowerShell track does not always conform to that. A -eq B will give false ne (not equals) Compares two values to be not equal. Ensure that applications do not treat empty strings and NULL values equivalently. To do this you use the ErrorAction parameter. Other Comparison Operators. Mine was a little different, I was comparing something where either side could have been null. If you do not have privileges to create new directory objects, then the operation fails. If you think you need to wait for a DBA to give you data from a SQL database then you’d be wrong. This SQL tutorial explains how to use the SQL IS NULL condition with syntax and examples. Comparison operators. Conversely, ensure that a null or empty value is not accepted as an input parameter by using the ValidateNotNull() PowerShell provides parameter validation attributes to handle all of these. equals(null) returns false. Syntax Out-Null [-inputObject psobject] [CommonParameters] Key -inputObject psobject The object that will be sent to null (deleted). I'm sure there's a way to do this solely in your measure without adding a calculated column, but adding a column is much easier at my level. Test web server SSL/TLS protocol support with PowerShell Recently I was tasked to configure SSL/TLS protocols and cipher suites for internal web servers via Group Policy. If two records of a single column have a NULL value, the column values are not considered equal. The IS NULL condition is used in SQL to test for a NULL value. "Strings of Zero Length Not Equivalent To NULL". The problem is that when I go to use Write-. Even the crippled DOS batch file language allowed writing some fairly powerful scripts and applications, though they often required extensive kludges and workarounds. blank) value or not isn’t a difficult task to do. During that process, you may need to deal with automatic variables, comparison operators, COM and. Simply by verifying PowerShell's return value, or exit code… Powershell $? operator The PowerShell operator $? contains True if the last operation succeeded and False otherwise. In simple words two NULL values are not considered as equal. If you use it incorrectly in an if statement, it may lead to unwanted results if a variable is on the left side of the statement:. (Get-ADUser-Filter {City -ne "London"}). PowerShell uses backquote as the escape character. These code samples assume you have configured AWS Credentials and a default AWS Region. I really am not trying to. You did not mention comparison array with null. Syntax Out-Null [-inputObject psobject] [CommonParameters] Key -inputObject psobject The object that will be sent to null (deleted). Peter van der Woude created an excellent PowerShell script and blog post to dynamically deploy applications to computers via a Task Sequence within ConfigMgr. I'm having an issue where, when there is no TPM data for a given object, which should be NULL, it evaluates to not NULL. Here are a few of the snipits I have come up with. I would like to update a single line of text field of my list where the lookup id matches the id of the lookup value in the other list. If you come from another language such as c# you'll be shocked. We'll also add an index to the table on the column that will be used in our WHERE clause. Task 1: See if a powershell cmdlet exists in the system. Please remember to be considerate of other members. To identify inactive computer accounts, you will always target those that have not logged on to Active Directory in the last last 90 days. WriteLine (x); // Assign the empty string literal to s. We can use the powershell's like operator with wildcard character to check if a string contains a word or another string with case-sensitive and case-insensitive. ^ Any one character not within the range ([^a=f]) or set ([^abcdef]. To see if two string values are not equal to each other, we use the comparison operator ne (Not Equal). It is easy for humans to read and write. Query with "Is Not Null" Criteria not Working I have a table that has Person's Names, Companies, and Phone Numbers. So quite often, translating the bash way of doing things to PowerShell is the bad way of doing things. Hello, I am somewhat new to Linux/Unix. MySQL converts TIMESTAMP values from the current time zone to UTC for storage, and back from UTC to the current time zone for retrieval. I usually avoid nullable columns, but sometimes date fields make sense to be null (rather than use sentinel values like 1/1/1900). I was used to == and <>. So I'm working with Powershell trying to query TPM data from computer objects. At their most basic, comparison operators are used to compare values and return either a boolean True or False value. In PowerShell such concepts involving equal are represented by -ge and -le, where 'e' stands for equal. … never talk about PowerShell scoping rules. Implementing the Perceptron algorithm in PowerShell. To check if a value is NULL or not, you use the Boolean operator IS NULL or IS NOT NULL. Speaking of > and <, they have >= and <= to represent greater than or equal and less than or equal. The inequality operator returns true if the operands are not equal. PowerShell is the de facto standard for automation and administration on Windows systems. When reviewing the operators listed below, keep in mind that all of them can be negated by putting the word "Not" between "Should" and the operator. Send output to null, delete output instead of sending it to the console. I'm not going to join in the great debate over why these operators where chosen, they exists within PowerShell and must be used. How to remove "local autodiscover" or SCP when migrating to O365 2 Replies I work in the SMB, and we migrate most of our clients to Office 365 from local exchange servers. PowerShell: Determine if string is null or is empty Posted on June 25, 2013 by Jacki Moody August 25, 2014 PowerShell makes it easy to check if a string is null or empty. WMI was introduced with Windows 2000, and has. You can remove this condition if you wish to run the script on all items in the list. _ (underscore. Learn the difference between a null, empty string, and white space value for a PowerShell variable and how to test for them. Agree or not, according Bruce the PowerShell's consistency would be broken. Knowing PowerShell can come in handy when you need to download files.