Exchange 2010 DB not releasing unused space...

We made a new Exchange DB and are moving the users over to it. The space on the old one has not gone down and I know this has something to do with having to write new data into that space before it realizes it's gone in Exchange 2010, but I made a new mailbox and specified the old database and it still won't free up the space from moving half of the users.

How can I get the space back from this DB?
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BusbarSolutions ArchitectCommented:
have you got any warning/errors in the application event viewer.
willlandymoreAuthor Commented:
couple of activesync errors but that was it...
Is there a solution to this problem?   I'm having exactly the same problems.   thanks
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willlandymoreAuthor Commented:
no, I couldn't get an answer for this one.
willlandymoreAuthor Commented:
we ended up creating a new DB and moving the accounts to it and then decommissioning the old one.

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willlandymoreAuthor Commented:
only fix that worked
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