Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2
Topic Last Modified: 2011-03-19
Using dial tone portability, users can have a temporary mailbox for sending and receiving e-mail while their original mailbox is being restored or repaired. The temporary mailbox can be on the same Exchange 2010 Mailbox server or on any other Exchange 2010 Mailbox server in your organization. The process for using dial tone portability is called a dial tone recovery, which involves creating an empty database on a Mailbox server to replace a failed database. To learn more, see Dial Tone Portability.
You must have fewer than the maximum number of databases deployed to create a dial tone database. Exchange 2010 Standard Edition supports a maximum of 5 databases per server. Exchange 2010 Enterprise Edition supports a maximum of 100 databases per server.
Use the Shell to perform a dial tone recovery on a single server
You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Mailbox recovery" entry in the Mailbox Permissions topic.
|You can't use the EMC to perform a dial tone recovery on a single server.|
- Make sure that any existing files for the database being
recovered are preserved in case they're needed later for further
- Use the New-MailboxDatabase
cmdlet to create a dial tone database, as shown in this
New-MailboxDatabase -Name DTDB1 -EdbFilePath D:\DialTone\DTDB1.EDB
- Use the Set-Mailbox cmdlet
to rehome the user mailboxes hosted on the database being
recovered, as shown in this example.
Get-Mailbox -Database DB1 | Set-Mailbox -Database DTDB1
- Use the Mount-Database
cmdlet to mount the database so client computers can access the
database and send and receive messages, as shown in this
Mount-Database -Identity DTDB1
- Create a recovery database (RDB) and restore or copy the
database and log files containing the data you want to recover into
the RDB. For detailed steps, see Create a Recovery
- After the data is copied to the RDB, but before mounting the
restored database, copy any log files from the failed database to
the recovery database log folder so they can be played against the
- Mount the RDB, and then use the Dismount-Database
cmdlet to dismount it, as shown in this example.
Mount-Database -Identity RDB1 Dismount-Database -Identity RDB1
- After the RDB is dismounted, move the current database and log
files within the RDB folder to a safe location. This is done in
preparation for swapping the recovered database with the dial tone
- Dismount the dial tone database, as shown in this example. Note
that your end users will experience an interruption in service when
you dismount this database.
Dismount-Database -Identity DTDB1
- Move the database and log files from the dial tone database
folder into the RDB folder.
- Move the database and log files from the safe location
containing the recovered database into the dial tone database
folder, and then mount the database, as shown in this example.
Mount-Database -Identity DTDB1
- Mount the RDB, as shown in this example.
Mount-Database -Identity RDB1
- Use the Get-Mailbox and
cmdlets to export the data from the RDB and import it into the
recovered database, as shown in this example. This will import all
the messages sent and received using the dial tone database into
the production database.
Get-Mailbox -Database DTDB1 | Restore-Mailbox -RecoveryDatabase RDB1
- After the restore operation is complete, you can dismount and
remove the RDB, as shown in this example.
Dismount-Database -Identity RDB1 Remove-MailboxDatabase -Identity RDB1
For detailed syntax and parameter information, see the following topics: