Hi Folks,
I am migrating from Server 2008 R2 to Server 2012 R2. All servers are running Exchange 2013 CU 13. I have a DAG01 on Server 2008 R2 and DAG02 on Server 2012 R2. I have noticed an issue when users on DAG01 database emails user on DAG02 database, the email fails to deliver and errors out with.
Remote Server returned '550 4.4.7 QUEUE.Expired; message expired in unreachable destination queue. Reason: There is currently no route to the mailbox database.'
However DAG02 users can email DAG01 users.
I am seeing error in event log on Mailbox server where queue is build up
event 5015
Microsoft Exchange cannot find a route to the source transport server or home MTA server ..... in routing tables with timestamp 11/27/2016 3:03:21 PM. Microsoft Exchange is ignoring the source transport server.
event 5006
Cannot find information about owning Mailbox Server ..... in routing tables with timestamp 11/27/2016 3:03:21 PM. Recipients will not be routed to this database.
I have checked the permission on exchange server object, they seems to be fine with Inheritable permissions checked.
I have restarted transport services across all dag members but no difference
nothing specific show in ExBpa report
appreciate if someone can help me point in right direction to get this issue fixed.
Regards, Navdeep