Forum Discussion

MCT

Jul 09, 2020

Exchange Hybrid Deployment single forest multiple email domains

Hi all, I have a question. I have 22 email domains on prems. ( Three EXC 2016). Points to a third-party mail scan. One primary domain and two upn Sufix added to local AD. My all users are synchron...

MVP

Jul 19, 2020

Abdul Farooque

OK, are the invalid domains configured in both Exchange On-premises, and Exchange Online?

Abdul Farooque

MCT

Jul 19, 2020

PeterRising ,

Yes, in office 365 all as "Internal Relay, and on-premises as Accepted domains.

PeterRising
MVP
Jul 19, 2020
Abdul Farooque

Fantastic, well done!!
Abdul Farooque
MCT
Jul 19, 2020
PeterRising ,,

Yay!!!! It is configured now.
PeterRising
MVP
Jul 19, 2020
Abdul Farooque

If these particular domains are in Exchange Online only, then I would suggest you don't select them in the HCW, as per step 11 in the following;

https://docs.microsoft.com/en-us/exchange/hybrid-deployment/deploy-hybrid#use-the-exchange-admin-center-and-hybrid-configuration-wizard-to-create-a-hybrid-deployment
Abdul Farooque
MCT
Jul 19, 2020
PeterRising ,

No Peter, this is something HCW team fix this..No such more friendly error. One thing I must mention here that there are couple of domains online (Accepted > MX>Online as well). These domains are not in On-premises Exchnage in Accepted list.

should I add them and try?
PeterRising
MVP
Jul 19, 2020
Abdul Farooque

Does the error show which particular error it is not happy with?