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How to test from group membership with Powershell

Posted on 2010-04-01
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Last Modified: 2012-05-09
Hi All,

I am using the Quest AD tool in conjuction with powershell to remove users from a group, I need a way to quickly check if a user belongs to the group before issuing the instruction to remove the user from the group.

I need something to return a boolean ideally, in VB you can use ISMember I think, all the powershell examples I have found so far enumerates the group and check if the user is a member, this method will slow my script down big time. If there's nothing that can do it natively in powershell perhaps accessing .NET object via powershell..

Any ideas????


Thanks in advance

-Steve
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Question by:Stevolee
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Accepted Solution

by:
Chris Dent earned 2000 total points
ID: 29351714

Which do you have a connection to at that point in the script, user or group?

If you've got the user, look at the MemberOf attribute and see if the group exists.

If you have the group, look at Member.

You can use the IsMember method in PowerShell as well. e.g.:

$Group = [ADSI]"LDAP://CN=Domain Admins,CN=Users,DC=domain,DC=com"
$Group.IsMember("LDAP://CN=Some Users,OU=Somewhere,DC=domain,DC=com")

Whether it's fastest depends on what connections you have at that point in the script.

Chris
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Author Comment

by:Stevolee
ID: 29361583
Hi Chris,
I have the connection set to the user can you please
post a sample code for that...

Thx Steve
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LVL 71

Expert Comment

by:Chris Dent
ID: 29446033

Sure :)

A spot of string comparison should work (even if it is a bit basic), you have to make MemberOf a string first, like this:


$User = Get-QADUser "SomeUser"
If ("$($User.MemberOf)" -Match "SomeGroupName")
{
  Remove-QADGroupMember "SomeGroupName" -Member $User.DN
}


Nothing to test that against here, you'll have to do that part I'm afraid.

Cheers,

Chris
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Author Comment

by:Stevolee
ID: 29447112
Thanks for the update will test and get back to you...
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Author Closing Comment

by:Stevolee
ID: 31709930
Thanks for the info Chris much appreciated!
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