Legal Hold & Discovery Searchs through ECP

In exchange 2010 we were running some discovery searches and tested the legal hold on the exchange server. I noticed that 40GB of space was taken up on the exchange data partition in one day. I was curious to know when you run these searches where the legal hold mailbox goes, would it have effected the exchange data parition in this way? or maybe the searches on the mailbox through ecp. However i deleted the searches we have run and turned off the legal hold as well.
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Matt PessolanoAsked:
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Hilal1924Commented:
All Searches are Stored by Default and Indices get created every time you run the serach which is the reason why it consumed the disk space. A discovery mailbox is created by default for such purposes which can of course be turned off.

Here is some more info:

http://microsoftblog.globalknowledge.com/2009/12/11/discovery-in-the-dark-of-night-searching-exchange-2010-mailboxes/
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Matt PessolanoAuthor Commented:
if the searches are deleted and legal holds removed with exchange reclaim the disk space?
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Hilal1924Commented:
Yes, though I have not come across this scenario, it should work.
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Matt PessolanoAuthor Commented:
would i notice the drop in disk space? or will exchange reclaim the space by defrag? im not sure if exchange 2010 defrag.
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Hilal1924Commented:
Exchange  does do online Defragmentation and also runs the cleanup agent on the mailboxes. Also has the functionality to empty the Dumpster one the retention period is over.
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