Powershell to exclude Group Members from Dynamic Distribution List

Question

I am attempting to remove specific users from a Dynamic Distribution List. I have searched and toyed with my PowerShell script for sometime with no luck. I'm sure it is something I am overlooking as I'm not too experienced with OPATH syntax. I've created this group within the EAC (2013) to include all email users internal and cloud.

When I do a:

Get-DynamicDistributionGroup –Identity “Email Users” | fl

It returns this as the RecipientFilter:

{((((RecipientType -eq 'UserMailbox') -or (RecipientType -eq
'MailUser'))) -and (-not(Name -like 'SystemMailbox{*')) -and
(-not(Name -like 'CAS_{*')) -and (-not(RecipientTypeDetailsValue -eq
'MailboxPlan')) -and (-not(RecipientTypeDetailsValue -eq
'DiscoveryMailbox')) -and (-not(RecipientTypeDetailsValue -eq
'PublicFolderMailbox')) -and (-not(RecipientTypeDetailsValue -eq
'ArbitrationMailbox')))}

I would like to exclude all members of the group DDGExclude. I've tried adding the following onto the command with no luck.

-and (-not(MemberOfGroup -eq ‘DDGExclude’))

I would also like to understand how can I exclude users that have the ExtensionCustomAttribute10 as NOSYNC. I have tried the following with no luck.

-and (ExtensionCustomAttribute10 -ne “NOSYNC”) 

Any help would be much appreciated.

Solution

One thing to do is not use invalid characters on the PowerShell commands.

-and (-not(MemberOfGroup -eq ‘DDGExclude’))  

should be:

-and (-not(MemberOfGroup -eq 'DDGExclude'))  

Also:

-and (ExtensionCustomAttribute10 -ne “NOSYNC”)  

should be:

-and (ExtensionCustomAttribute10 -ne "NOSYNC")  

Comments

[Matt]

Just to clarify what you mean by "with no luck", the dynamic distribution list contains the system mailboxes (which you're trying to exclude) as well as the users with "NOSYNC" in ExtensionAttribute10 (which you're also trying to exclude)?

[Jim]

Meaning that the command would not take. I would get various errors within Powershell. Right now, the DDL has all user objects with mailboxes. But I'd like to exclude a certain group or users with the custom attribute value.

[Matt]

Can you post the errors you are getting?

[Jim]

I'll correct the quotes as listed below and run it again. Yes, it is a hybrid mail environment.

[Jim]

I wanted to clarify incase others look at this thread for help. When using the MemberOfGroup, just the group name won't work, I had to reference the complete DN name.