Feb 19 2019 12:59 PM
Hi all,
I am going into a really weird issue, I have a Exchange 2010 Hybrid scenario, the MX records are pointed to Exchange Online.
The issue is that On-premise mailboxes are not receiving email from external domains and the sender doesn't receive any error reply. Mail flow between Office 365 and on-premise is working fine and external domain emails are correctly delivered to Online mailboxes.
Does someone have an idea ?
Many thanks for your help
Feb 19 2019 01:38 PM
Feb 20 2019 12:04 AM
What does a message trace show?
Feb 20 2019 07:37 AM
Hi Vasil,
I have found out that the message were pending within Exchange Online because an insufficient ressource on the On-Premise server. (System was under 5Go space free, after getting some space the messages have been correctly delivered).
Many thanks for your help