FORCE MOVE ACTIVE MAILBOX WHEN THE ACTIVE MAILBOX FAILED

We found this problem happen on the Microsoft Exchange 2010 Mailbox server. Suddenly, one of the member of DAG (Exch01 server) with Active mailbox is down, because the storage issue. So the user request to move the Active mailboxes to another DAG member (Exch02 server), based on checking before the problem happen the replication status is healthy. So we decided to move active mailboxes by using the command as below;

move-activemailboxdatabase -identity  mailbox_db1  -activateonserver Exch02 -mountdialoverride:none -skip activationchecks -skiplagchecks -skipclientExperiencechecks

FAILED TO MOUNT DATABASE ON EXCHANGE 2010

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

UNABLE TO REMOVE LAST MAILBOX IN EXCHANGE 2010

We are planning to remove our Microsoft Exchange 2010, mailbox server. During the installation process, we get the error below:

Error:
This mailbox database contains one or more mailboxes, mailbox plans, archive mailboxes, or arbitration mailboxes. To get a list of all mailboxes in this database, run the command Get-Mailbox -Database <Database ID>. To get a list of all mailbox plans in this database, run the command Get-MailboxPlan. To get a list of archive mailboxes in this database, run the command Get-Mailbox -Database <Database ID> -Archive. To get a list of all arbitration mailboxes in this database, run the command Get-Mailbox -Database <Database ID> -Arbitration. To disable a non-arbitration mailbox so that you can delete the mailbox database, run the command Disable-Mailbox <Mailbox ID>. To disable an archive mailbox so you can delete the mailbox database, run the command Disable-Mailbox <Mailbox ID> -Archive. Arbitration mailboxes should be moved to another server; to do this, run the command New-MoveRequest <parameters>. If this is the last server in the organization, run the command Disable-Mailbox <Mailbox ID> -Arbitration -DisableLastArbitrationMailboxAllowed to disable the arbitration mailbox. Mailbox plans should be moved to another server; to do this, run the command Set-MailboxPlan <MailboxPlan ID> -Database <Database ID>.

Based on our experience during removing/clean up all the mailbox users and this is the last database that we unable to remove, so it's may because of the mailbox arbitration. To verify, just run the command as below:

Get-Mailbox -Arbitration -Database <databasename>

 

After verified, run the command to disable last arbitration mailbox, as below:

Get-Mailbox -Arbitration | Disable-Mailbox -Arbitration -DisableLastArbitrationMailboxAllowed



To confirm choose A to Yes to all.  After that we can manually remove the last mailbox and uninstall the mailbox server.