I have two exchange servers setup in two dofferent AD sites and setup DAG. There was DAG occurred and primary mailbox database was dismounted and secondary mailbox DB was activated. I manually mounted primary DB and it was OK but the next day it occurred again.
I'm trying to check what triggered fail-over. I checked the event logs in server on time stamp before fail-over happened but i seems event logs error are not related to why fail-over triggered.
Could you please advise me how to check why fail-over started?