Adding and removing extensionattribute to AD object

问题

I'm using powershell to modify some AD extensionattribute.

This is my code to add an extensionattribute

Set-ADUser -Identity "anyUser" -Add @{extensionAttribute4="myString"}

It works, but how can I remove the same extensionattribute? I can't find anything similar to -remove.

回答1:

You could try using the -Clear parameter

Example:-Clear Attribute1LDAPDisplayName, Attribute2LDAPDisplayName

http://technet.microsoft.com/en-us/library/ee617215.aspx

回答2:

I used the following today - It works!

Add a value to an extensionAttribute

 $ThisUser = Get-ADUser -Identity $User -Properties extensionAttribute1
    Set-ADUser –Identity $ThisUser -add @{"extensionattribute1"="MyString"}

Remove a value from an extensionAttribute

  $ThisUser = Get-ADUser -Identity $User -Properties extensionAttribute1
  Set-ADUser –Identity $ThisUser -Clear "extensionattribute1" 

回答3:

I have struggled a long time to modify the extension attributes in our domain. Then I wrote a powershell script and created an editor with a GUI to set and remove extAttributes from an account.

If you like, you can take a look at it at http://toolbocks.de/viewtopic.php?f=3&t=4

I'm sorry, that the description in the text is in German. The GUI itself is in English.

I use this script on a regular basis in our domain and it never deleted anything or did any other harm. I provide no guarantee, that this script works as expected in your domain. But as I provide the source, you can (and should) have a look at it, before you run it.

回答4:

Extension attributes are added by Exchange. According to this Technet article something like this should work:

Set-Mailbox -Identity "anyUser" -ExtensionCustomAttribute4 @{Remove="myString"}

回答5:

Or the -Remove parameter

Set-ADUser -Identity anyUser -Remove @{extensionAttribute4="myString"}

回答6:

To clear the value you can always reset it to $Null. For example:

Set-Mailbox -Identity "username" -CustomAttribute1 $Null

回答7:

Set-ADUser -Identity anyUser -Replace @{extensionAttribute4="myString"}

This is also usefull

来源：https://stackoverflow.com/questions/15807496/adding-and-removing-extensionattribute-to-ad-object