Forum Discussion
Dynamic Distribution Group issue in Hybrid Exchange Setup
We finally able to solve this issue while working with Office 365 Support. It has taken a long time due to ping pong between on premises and Exchange Online teams. Anyway, after digging a while - solution turned out be an attribute issue, which solved our problem.
1. we re-run the Hybrid configuration wizard then following command was run on affected Dynamic Distribution Group.
Set-DynamicDistributionGroup DDG1@abc.com -RequireSenderAuthenticationEnabled $false
Hopefully, it may help someone out there. Thanks.
Running out of ideas now. Did you try changing the accepted domain in Exchange Online to Internal Relay as the original document you posted suggested?
Short of this, I would suggest opening a ticket with Microsoft support as your next logical step.
Thanks Peter. Well, I will do that and will post the solution. Thanks for your all support.