No client access on DAG switchover - Single site

Question

Let’s summarize my environment:
I have 3 Exchange 2013 SP1 (cu4) server in one site. CAS01, only have cas role and MBX01&MBX02 have only mailbox. Both mailbox are in a DAG (DAG01).
The server mounting my database is MBX02. Whenever a switchover to MBX01 occur (or when I force it whith Move-ActiveMailboxDatabase –server MBX02 -ActivateOnServer MBX01), all my client get disconnected so no more outlook, active sync
and even owa. As soon as I roll them back on MBX02, everything returns to normal. However, every single email delivered while the DAG was mounted on MBX01 are getting delivered to the mailbox server so dag is working properly for the mail flow, minus the client
access HA.
Now I know that on Exchange 2010 and the issue could have been with the value of –rpcclientaccessserver on my database, but this value is not used anymore on 2013.
Any ideas?
Thanks

Answer 1

Hi  S.Nithyanandham
1. No my servers are working pretty fine is I create a non dag DB on MBX01, Client access and mail flow is fine. Turning off both Windows firewall didn’t
change anything
2.
Server Check                Result Error
MBX01  ClusterService       Passed
MBX01  ReplayService        Passed
MBX01  ActiveManager        Passed
MBX01  TasksRpcListener     Passed
MBX01  TcpListener          Passed
MBX01  ServerLocatorService Passed
MBX01  DagMembersUp         Passed
MBX01  ClusterNetwork       Passed
MBX01  QuorumGroup          Passed
MBX01  FileShareQuorum      Passed
MBX01  DatabaseRedundancy   Passed
MBX01  DatabaseAvailability Passed
Server Check                Result Error
MBX02  ClusterService       Passed
MBX02  ReplayService        Passed
MBX02  ActiveManager        Passed
MBX02  TasksRpcListener     Passed
MBX02  TcpListener          Passed
MBX02  ServerLocatorService Passed
MBX02  DagMembersUp         Passed
MBX02  ClusterNetwork       Passed
MBX02  QuorumGroup          Passed
MBX02  FileShareQuorum      Passed
MBX02  DatabaseRedundancy   Passed
MBX02  DatabaseAvailability Passed
MBX02  DBCopySuspended      Passed
MBX02  DBCopyFailed         Passed
MBX02  DBInitializing       Passed
MBX02  DBDisconnected       Passed
MBX02  DBLogCopyKeepingUp   Passed
MBX02  DBLogReplayKeepingUp Passed
3. I’ve double check that  and recreated the dag binding multiple time with no luck.
4. yes they are
[PS] C:\Windows\system32>get-mailboxdatabasecopystatus | ft -au
Name      Status  CopyQueueLength ReplayQueueLength LastInspectedLogTime ContentIndexState
DB1\MBX01 Mounted 0               0                                     
Healthy
DB2\MBX01 Mounted 0               0                               
      Healthy
DB3\MBX01 Mounted 0               0                                     
Healthy
DB4\MBX01 Mounted 0               0                                     
Healthy
[PS] C:\Windows\system32>get-mailboxdatabasecopystatus -server mbx02 | ft -au
Name      Status  CopyQueueLength ReplayQueueLength LastInspectedLogTime ContentIndexState
DB1\MBX02 Healthy 0               0                 2015-01-12 19:57:58  Healthy
DB2\MBX02 Healthy 0               0                 2015-01-12 19:58:10  Healthy
DB3\MBX02 Healthy 0               0                 2015-01-12 19:58:07  Healthy
DB4\MBX02 Healthy 0               0                 2015-01-12 20:00:23  Healthy
5. None except those related to the failover if I bring MBX02 down
6. File share is fine and acessible.
Then please explain me what you are trying to say on the below mentioned line?
When I have a failover and database are mounted and healthy I can’t connect trougth any devices but email sent to my organization are devilered in databases correctly. I can see them with Get-MessageTrackingLog. In addition, my Wtachguard
in front of my cas is not reporting any bounce or error, everything is delivred and queue is empty inside it.
A big Thank you for your help
Alex
Alexandre Contant