Remote Server returned '550 5.7.106 APPROVAL.InvalidContent; Invalid content. [Stage: OnCreatedEvent

Copper Contributor

Hello,

I have hybrid exchange environment where I have set moderator approval on one onprem dynamic distribution group. When approver who is in o365 approves mail delivery, he gets NDR with following error:

Remote Server returned '550 5.7.106 APPROVAL.InvalidContent; Invalid content. [Stage: OnCreatedEvent][Agent: Approval Processing Agent]'

Sender of NDR is onprem arbitration mailbox.

Remotedomain settings should be ok.

 

Anybody  have idea what is issue here?

 

Thank You.

1 Reply

@DoNotHackMe I have the same issue, will be watching this thread.  Have you opened a ticket with MSFT?