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.