I have 3 Exchange 2010 SP3 servers and 1 Exchange 2013 CU2 server. I can move users back and forth, mail flow works etc.
I try to join the exchange 2013 server (lets call it ServerB) to the DAG with the shell command
add-databaseavailabilitygroupserver -identity exchange -mailboxserver serverb
and I get an error :
WARNING: An unexpected error has occurred and a Watson dump is being generated: Server 'ServerA' must be running
Exchange Server 2010.
Specified cast is not valid.
+ CategoryInfo : NotSpecified: (:) [Add-DatabaseAvailabilityGroupServer], InvalidCastException
+ FullyQualifiedErrorId : System.InvalidCastException,Microsoft.Exchange.Management.SystemConfigurationTasks.AddDa
+ PSComputerName : serverb.domain.com
Yet server a is running 2010, it is sp3 and its been rebooted serveral times. What am I missing ? (ServerB and Server A are on the same local LAN also)