Exchange Client access not work when move DB to another MBX server

Chong 441 Reputation points
2021-03-08T16:32:30.227+00:00

Hi Support,

I have 4 exchange 2013 cu22 server (2 CAS and 2 MBX servers). 2 MBX is configured a DAG and witness configure to other server.

When the DB mount on MBX2, everything fine.

When I mount the database to MBX1, both OWA and ECP can access. Outlook can send/receive email but the connection show "trying to connect. Then if i restart either one of the CAS, both OWA and ECP will show HTTP503 error and Outlook cannot connect. In this moment, all DB still mount and failover cluster all resource is "UP", so the DAG should be fine. But all client access not work.

Services will not resume even all CAS and MBX servers are started. It will solve until I mount the DB back to MBX2. Seems the MBX1 is not in function but don't have any error message. Any idea?

Thanks
Chong

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Chong 441 Reputation points
    2021-03-11T06:30:14.063+00:00

    Recreate the self-sign certificate and bind to https (444 port) in MBX1 server IIS solved the problem