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Check exchange logs on server in event viewer.
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Check exchange logs on server in event viewer.

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This might help you to find root cause<br />
<a href="http://exchangeserverpro.com/database-failover-wrong-server/" rel="ugc">http://exchangeserverpro.com/database-failover-wrong-server/</a>
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This might help you to find root cause
http://exchangeserverpro.com/database-failover-wrong-server/ [http://exchangeserverpro.com/database-failover-wrong-server/]

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Hi,<br />
<br />
I have a 2node Exchange DAG on 2013 SP1, all is fine however quite often 2 of my mailbox DBs flip over to server 2, always the same pattern. &nbsp;What's the best way to determine the reason why?<br />
<br />
DB1 &amp;&nbsp;DB2 sit on Exchange 1 for a while and then eventually move over, I checked logs but impossible to track!
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Hi,

I have a 2node Exchange DAG on 2013 SP1, all is fine however quite often 2 of my mailbox DBs flip over to server 2, always the same pattern.  What's the best way to determine the reason why?

DB1 & DB2 sit on Exchange 1 for a while and then eventually move over, I checked logs but impossible to track!

Exchange 2013 DAG Failover Reason

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.