• In “Exchange Admin Center”, I can confirm the user has been removed from the Distribution List ✅
• In my own Outlook Online if I address a new email to the distribution group and click the “+” to expand the group, I can see the user has been removed from the group ✅
• In my own Outlook Online if I switch from email view to “People” view and open the distribution list and look at the members, I can still see the old user in the list!!❌

Why is the Office365 Outlook Online expanded group different to that same group’s list of members in the People section?

The data that you want is in the AcceptMessagesOnlyFromSendersOrMembers property of a DL. So, you need to retrieve that information and output it in the report. The data is an array, so you probably want to expand the individual members and create a string containing their display names.

If you can identify the problematic DL, you might be able to run the code interactively to find where the problem is… and if you report it here, we will see what we can do.

Thank you for the reply.
I suppose I do. I will try to debug it. Thank you.

Do you have any distribution lists that are nested more than 3 deep? That might be the reason (based on the reference to call depth).

Apart from that, I have no idea. I can’t debug PowerShell remotely… but you can debug the code on your tenant…

The script failed due to call depth overflow.
+ CategoryInfo : InvalidOperation: (0:Int32) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : CallDepthOverflow

I tried to change the name of the file, but it didn’t help. Any ideas?

Change the line which removes duplications from DL members to:

$MembersNames = $MembersNames | Sort MemberId -Unique | Sort MemberName

Thank you for that!
My apologies, I was looking into the other powershell script (ReportDLMembershipsCountsGraph) and I noticed that the “Sort-Object DisplayName” doesn’t work for the DL members names.

$Uri = “https://graph.microsoft.com/v1.0/groups/” + $DL.ExternalDirectoryObjectId + “/transitiveMembers”
[array]$Members = Get-GraphData -AccessToken $Token -Uri $uri | Sort-Object DisplayName

When I run the script, I don’t get any error message but the names are all messed up. Am I missing something? Is there a way to sort both the members and the managers names in that script?

Many thanks in advance

It’s PowerShell, so you can sort as you like. To sort the members of a DL by their display name, add a Sort command after the members are fetched. For instance:

[array]$Members = Get-AzureADGroup -ObjectId $DL.ExternalDirectoryObjectId | Get-RecursiveAzureAdGroupMemberUsers | Sort DisplayName