Data synchronization state of availability database is not healthy
This policy rolls up the data synchronization state of all availability databases (also known as "database replicas") in the availability replica. The policy is in an unhealthy sate when any database replica is not in the expected data synchronization state. The policy is otherwise in a healthy state.
For this release of SQL Server 2014, information about possible causes and solutions is located at Data synchronization state of some availability database is not healthy on the TechNet Wiki.