We are in the process of migrating from Exchange 2010 to 2013 and have the co-existence up and running correctly.
Our setup is fairly simple. We have two sites ("COL" and "HAV") connected by a point to point line. Each site has one Exchange 2013 server running on Windows Server 2012 R2 (MAIL-COL-2 and MAIL-HAV-2) with one active mail DB on it and a passive copy of the DB from the other site.The HAV DB is just over 9Gb and the COL DB is about 200Mb, as we've not migrated many mailboxes yet.
The problem is that the nodes are not synchronising the passive DB copies correctly. When I update using Exchange Management Shell (Update-MailboxDatabaseCop
y -identity db2013-hav-1\mail-col-2 -DeleteExistingFiles), it transfers between 1Gb and 1.6Gb (it varies between attempts, presumably time specific) before failing with the following error:
The seeding operation failed. Error: An error occurred while performing the seed operation. Error: Communication was
terminated by server 'MAIL-HAV-2': Data could not be read because the communication channel was closed. [Database:
DB2013-HAV-1, Server: MAIL-COL-2.titon.co.uk]
The event log on MAIL-HAV-2 elaborates on this with an MsExchangeRepl Warning Id 4136:
Seed-from-active for database 'DB2013-HAV-1' to the passive copy on server MAIL-COL-2 was cancelled. Error: The seeding
was cancelled for database 'DB2013-HAV-1' because the copy configuration changed on the seeding source 'MAIL-HAV-2' ( a
failover could have happened ) or replay service is shutting down on the seeding source. ReasonCode=ConfigChanged.
This is backed up by several Informational event ID 16028s for various Exchange services. For example:
A forced configuration update for Microsoft.Exchange.Transport.ReceiveConnectorConfiguration has successfully completed.
Object details from the last notification-based reload: . New details:
According to Microsoft's documentation, this behaviour is by design, but it seems to be interfering with our DB copy process. There is no physical update of the configuration by any Exchange admin, but these are being recorded every couple of minutes in batches of 7 or 8.
Does anyone have any advice for how to proceed? Thanks in advance.