An Exchange database may failover when the Exchange replication service is unable to access a transaction log file that is in use by another process.
The step by step guide for installing Cumulative Updates and Service Packs in an Exchange Server 2013 environment.
How to perform a manual database switchover in an Exchange Server 2013 database availability group.
This PowerShell script for Exchange Server produces a health report of your Database Availability Groups.
When creating an Exchange Server 2013 DAG you may receive an error that the Exchange Trusted Subsystem is not a member of the local Administrators group on specified witness server.