AlwaysOn Availability Groups may be reported as NOT SYNCHRONIZING after you apply SQL2012 SP2 CU3 or SQL2012 SP2 CU4 or SQL2014 CU5

<last update Feb 4-2015, originally published Jan 21-2015>     Dear customers,we would like to inform you of a problem that we have discovered.   When you apply SQL Server 2012 Service Pack 2 Cumulative Update 3 or SQL Server 2012 Service Pack 2 Cumulative Update 4 or SQL Server 2014 Cumulative Update 5 on… Read more