Forum Discussion
NDR not received when sending from an Office 365 group
Just tested this out myself - looks like the office365 group mailbox sets up a rule to automatically delete any NDR's it receives:
That's why nothing is received back. I'm probably being a bit stupid, but I'm struggling to find and amend the mailbox rule for the O365 group either in the GUI or in Powershell. Just tried a quick mail flow rule to redirect automatic elsewhere, but it wouldn't allow it. Going to still have a play around with it for a bit.
- Thanks for this - at least one now knows why the difference between personal and send-as routes.
Well, haven't found a way to edit the Office 365 group mailbox, but have found that giving users send-on-behalf permissions rather than send-as generates a NDR.
Thanks for finding this issue and discovering what's going on with message traces etc. To get it some visibility (and hopefully have Microsoft fix the problem), I wrote the problem up in https://office365itpros.com/2019/09/26/office-365-groups-ndr-oddity/ and have sent it to some folks in Microsoft who might be able to persuade some engineering effort to happen. Don't expect an earlt fix though. These things take time.
Thanks TonyRedmond, great write up.
- Unfortunately, I don't think they want the "On behalf of" tag adding to the emails. I'll check though.
