We found a problem to mount the mailbox database on Exchange 2010 server, below is the error details & screen capture.
An Active Manager operation failed. Error An Active Manager operation encounter an error. To perform this operation, the server must be a member of a database availability group and the database availability group must have quorum. Error: Automount consensus not reached.
Based on my troubleshooting, the issue resolved after we start the DAG with ExchangeShell command as below;
Start-DatabaseAvailabilityGroup -Identity "DAG_Name" -MailboxServer "MBX_name"
To identify the DAG name you may run this command on exchange shell
Get-DatabaseAvailabilityGroup
