Can I defragment an Exchange database using a network drive if I don't have enough space locally?

A. Yes, you can use the /t switch with the Eseutil utility to specify a local or remote location as the temporary folder to be used for the database to be defragmented. Using a remote location might slow down the defragmentation process, however. In the example below, I specified the Z drive, which maps to a network path (or you can use a UNC path), and a temporary file name for the database.

C:\Program Files\Exchsrvr\bin>eseutil /d "c:\program files\exchsrvr\mdbdata\priv1.edb" /tz:\tempdfrg.edb
Microsoft(R) Exchange Server Database UtilitiesVersion 6.5
Copyright (C) Microsoft Corporation. All Rights Reserved.

Initiating DEFRAGMENTATION mode...
Database: c:\program files\exchsrvr\mdbdata\priv1.edb
Streaming File: c:\program files\exchsrvr\mdbdata\priv1.STM
Temp. Database: z:\tempdfrg.edb
Temp. Streaming File: z:\tempdfrg.STM

Defragmentation Status (% complete)

0 10 20 30 40 50 60 70 80 90 100
|----|----|----|----|----|----|----|----|----|----|
...................................................


Moving 'z:\tempdfrg.edb' to 'c:\program files\exchsrvr\mdbdata\priv1.edb'...
File Copy Status (% complete)

0 10 20 30 40 50 60 70 80 90 100
|----|----|----|----|----|----|----|----|----|----|
...................................................


Moving 'z:\tempdfrg.STM' to 'c:\program files\exchsrvr\mdbdata\priv1.stm'...
File Copy Status (% complete)

0 10 20 30 40 50 60 70 80 90 100
|----|----|----|----|----|----|----|----|----|----|
...................................................


Note:
It's recommended that you immediately perform a full backup
of this database. If you restore a backup made before the
defragmentation, the database will be rolled back to the state
it was in at the time of that backup.

Operation completed successfully in 17.846 seconds.
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