Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2
Topic Last Modified: 2011-06-08
If a Mailbox server that's a member of a database availability group (DAG) is lost or otherwise fails and is unrecoverable and needs replacement, you can perform a server recovery operation. Microsoft Exchange Server 2010 Setup includes the switch /m:RecoverServer that can be used to perform the server recovery operation. Running Setup with the /m:RecoverServer switch causes Setup to read the server's configuration information from Active Directory for a server with the same name as the server from which you're running Setup. After the server's configuration information is gathered from Active Directory, the original Exchange files and services are then installed on the server, and the roles and settings that were stored in Active Directory are then applied to the server.
Looking for other management tasks related to DAGs? Check out Managing Database Availability Groups.
|If Exchange is installed in a location other than the default
location, you must use the /TargetDir Setup switch to
specify the location of the Exchange program files. If you don’t
use the /TargetDir switch, the Exchange program files will
be installed in the default location
To determine the install location, follow these steps:
Use Setup /m:RecoverServer to recover a server
You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the"Mailbox database copies" entry in the High Availability Permissions topic.
- Retrieve any replay lag or truncation lag settings for any
mailbox database copies that exist on the server being recovered by
using the Get-MailboxDatabase
Get-MailboxDatabase DB1 | Format-List *lag*
- Remove any mailbox database copies that exist on the server
being recovered by using the Remove-MailboxDatabaseCopy
- Remove the failed server's configuration from the DAG by using
Remove-DatabaseAvailabilityGroupServer -Identity DAG1 -MailboxServer MBX1
|If the DAG member being removed is offline and cannot be brought online, you must add the ConfigurationOnly parameter to the above command.|
- Reset the server's computer account in Active Directory. For
detailed steps, see Reset a Computer Account.
- Open a Command Prompt window. Using the original Setup media,
run the following command.
- When the Setup recovery process is complete, add the recovered
server to the DAG by using the Add-DatabaseAvailabilityGroupServer
Add-DatabaseAvailabilityGroupServer -Identity DAG1 -MailboxServer MBX1
- After the server has been added back to the DAG, you can
reconfigure mailbox database copies by using the Add-MailboxDatabaseCopy
cmdlet. If any of the database copies being added previously had
replay lag or truncation lag times greater than 0, you can use the
ReplayLagTime and TruncationLagTime parameters of the
cmdlet to reconfigure those settings.
Add-MailboxDatabaseCopy -Identity DB1 -MailboxServer MBX1 Add-MailboxDatabaseCopy -Identity DB2 -MailboxServer MBX1 -ReplayLagTime 3.00:00:00 Add-MailboxDatabaseCopy -Identity DB3 -MailboxServer MBX1 -ReplayLagTime 3.00:00:00 -TruncationLagTime 3.00:00:00