looking for exchange acounts that are missing from a distribution group in office365

GRGatlin 1 Reputation point

I have distribution group that should contain all employees. This group contains distribution groups for individual offices. Sometimes there are missing users. Is there a simple way to find users that are not listed in the main distribution group.

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Michel de Rooij 1,536 Reputation points MVP

    The DG is a static one of Dynamic Distribution Group? The latter case, the set of users can of course vary from the moment of sending to the moment of analysis.
    A static DG, you can perform a comparison of the current members against all expected members, eg get-distributiongroupmember <ID> vs get-mailbox

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  2. Kael Yao-MSFT 37,586 Reputation points Microsoft Vendor

    Hi @GRGatlin

    If you are using dynamic distribution groups and an attribute (for example department) as the filters, I suppose you may search for users who have an empty value of this attribute.
    You may connect to Azure AD powershell if you have the required permissions and run a cmdlet like:

    Get-AzureADUser | Where-Object {$_.Department -eq $null} | Select DisplayName  

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