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Exchange 2010 database disk space


This thing is driving me crazy. I have an Exchange 2010 server up and running. In one of my disks there is a database that is reported to be 63GB in size (according to Exchange shell command). Nevertheless, the folder has a total file size of 100GB.

I don't know how to free the available space or to shrink the database.

Can anybody tell me how?

Thank you
1 Solution
Please take a look at this article :


Exchange Server 2010 mailbox databases grow in size as the data within them grows. But they will never shrink when data is removed from them.

For example if you have a 20Gb mailbox database file and move 4Gb worth of mailboxes to another database, the file will remain at 20Gb in size.

However, the database itself will have 4Gb of “white space” in it, which is space that is available for new data to be written without growing the size of the file.

Your options to reclaim that space are to either:
Create a new mailbox database and move all the mailboxes to that database
Perform an offline defrag of the existing database to shrink the file
Your database will count "white space" or holes where deleted data was once. These are the first places filled in with new data, so the database should not grow.

Also, if Deleted Item Retention is set, then this can also take up space that is not counted under mailbox size.
avvwebAuthor Commented:
Thanks, worked like a charm.
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