Forum Discussion
Can't Turn On Exchange Online OnPremises Inbound Connectors
Seems that Microsoft have made some changes without any notification that you can now no longer setup OnPremises Inbound Mail Connectors in Office 365 without having to contact Microsoft Support to g...
Same issue. I manage a few different 365 tenants and this particular was was created around January '23. I now have 3 connectors (email security and signature platform) that I can't turn on and have been asked by MS to justify the connectors. To say it's made my blood boil is an understatement. Only MS can pull something like this and we just have to obey.
xtremetoonz Have a look here, I also posted on the Partner Support page and have slightly more response but still battling with Microsoft Support to get it resolved after about 3 weeks now. Luckily I was able to setup an SMTP relay to use in the meantime otherwise the customer would be fuming!
https://www.microsoftpartnercommunity.com/t5/Feedback-Support-Discussions/Unable-to-setup-OnPremises-Inbound-Mail-Connecter-in-Exchange/m-p/89845#M3590