To make free space on myu exchange database, i moved a large amount of email in PST files.
I created a PST for each user whose mailbox was too big and then I moved the old items in the PST.
Overall, I moved about 20GB of data on PST file.
I made an online defragmentation and then I made ¿¿an offline defragmentation using the command eseutil.exe /d d:\exchange\priv1.edb /t d:\exchange\defragtemp.edb
It allowed me to gain about 250MB.
How to get the 20GB of space I've done by moving the email in PST?