MSExchange Mailbox Replication 1006 warning

The event log shows MSExchange mailbox replication warning Event ID 1006. The Microsoft Exchange Mailbox Replication service was unable to process jobs in a mailbox database. Why do you see Event ID 1006 in Event Viewer, and what is the solution?

Warning MSExchange Mailbox Replication

Start Event Viewer and filter on Event ID: 1006.

The Microsoft Exchange Mailbox Replication service was unable to process jobs in a mailbox database.
Database: Mailbox Database 1246908739
Error: MapiExceptionMdbOffline: Unable to make connection to the server. (hr=0x80004005, ec=1142)

Solution MSExchange mailbox replication warning Event ID 1006

Start Services. Restart the service Microsoft Exchange Mailbox Replication. You can restart the service during the working hours.

Have a look at the Event Viewer after restarting the service. The Event ID 1006 MSExchange mailbox replication is gone. Did this work for you?

How did MSExchange mailbox replication 1006 happen?

You removed or dismounted the database in Exchange Server 2013/2016/2019. The Exchange server is still making use of the database. For example, there was a migration going on from this database to another database.

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Conclusion

In this article, you learned how to solve MS Exchange mailbox replication warning Event ID 1006. First, check the Event Viewer for Event ID 1006. After that, restart the service, as shown in the article. As of last, verify that the warning is not showing anymore.

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