Cmdlet to get AcceptMessagesOnlyFrom property for Distribution groups

Question

I guess this is a continuation of an age old question posted by ShayLevi in 2009 in the below post.

https://social.msdn.microsoft.com/Forums/en-US/6b5fbd76-8c9a-4d41-b291-9496ba9626e0/cmdlet-to-get-acceptmessagesonlyfrom-property-for-distribution-groups?forum=ITCG

Someone going with the name "Guy Techie" asked a question about this command but never got answered. I would like to repeat his question here again because I have run into an issue with similar setting.

I've used your command:

Get-DistributionGroup -ResultSize Unlimited -filter {AcceptMessagesOnlyFrom -ne $null} | select-object Name,@{Name="AcceptMessagesOnlyFrom";Expression={[string]::join(";",($_.AcceptMessagesOnlyFrom | foreach {Split-Path $_ -Leaf}) )}} | export-csv c:\DistList.csv

and works great, but it does not list security groups or it's members who are also in the "AcceptMessagesOnlyFrom" attribute. Is there a way to also list the security groups as well?

Answer 1

Hi @Hishan

We could refer to the introduction to the parameter in the official document:

The AcceptMessagesOnlyFrom parameter specifies who is allowed to send messages to this recipient. Messages from other senders are rejected. Valid values for this parameter are individual senders in your organization(mailboxes, mail users, and mail contacts).

However, The AcceptMessagesOnlyFromSendersOrMembers parameter specifies who is allowed to send messages to this recipient. Messages from other senders are rejected. Valid values for this parameter are individual senders and groups in your organization. Individual senders are mailboxes, mail users, and mail contacts. Groups are distribution groups, mail-enabled security groups, and dynamic distribution groups.

For example:

You could try the command like this to make it list all users and security groups:

Get-DistributionGroup -ResultSize Unlimited -filter {(AcceptMessagesOnlyFrom -ne $null) -or (AcceptMessagesOnlyFromDLMembers -ne $null) } | select-object Name,@{Name="AcceptMessagesOnlyFrom";Expression={[string]::join(";",($_.AcceptMessagesOnlyFromSendersOrMembers | foreach {Split-Path $_ -Leaf}) )}} | export-csv c:\DistList.csv  

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Answer 2

The cmdlet above will return data for Mail-enabled security groups too. "Pure" security groups are not relevant here.

Answer 3

Hi there,

You may not have access to some parameters if they're not included in the permissions assigned to you.

You can check this with help of powershell.
Find the permissions required to run any Exchange cmdlet
https://learn.microsoft.com/en-us/powershell/exchange/find-exchange-cmdlet-permissions?view=exchange-ps

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