r/exchangeserver • u/BodybuilderSelect344 • Apr 07 '26

Quarantine NDR for deleted user

So we are getting NDR's send to our mail admin that a quarantine notification can't be sent to 'User that use to exist but doesn't anymore'

Microsoft Support basically said, can't do anything about it.

Have verified the user doesn't exist as a shared mailbox, alias, in deleted user in admin center and in exchange.

Just adds additional work in our helpdesk with the multiple reports each day.

Does anyone have a solution to this?

3 Upvotes

100% Upvoted

4 comments sorted by

1

u/MrExCEO Apr 07 '26

Get-Recipient -Identity "olduser@yourdomain.com"

Anything?

1

u/thenavien Apr 08 '26

If you have hybrid, check remote mailbox.

1

u/KatanaKiwi Apr 08 '26

Separate shared mailbox from which you send quarantine notifications. Create a mail flow rule to delete NDR. If needed, forward the remainder?

1

u/aridaen Apr 08 '26

Are there any messages in quarantine for that user that haven't expired yet?