In a Microsoft Exchange Server 2013 environment, when you restart a database availability group (DAG) node that contains active database copies, the healthy copies on other DAG nodes are not enabled. Meanwhile, event ID 4999 for MSExchangeRepl.exe and MSExchangeDagMgmt.exe are recorded in the Application log multiple times until the restarted node has completely restarted. While this is occurring, Windows clients may be disconnected.
The following events are recorded in the Application log:
The following events are recorded in the Application log: