Hello, sorry for my english, french speaking...I have read on a Microsoft Article about Exchange database Offline defragmentation that we need 110 % of database size in FREE space.The problem is that I don't have any free space on my disk partition... (less than 1Mb free Oo !!!)What do you suggest ?thanks for replies.

You can run the defragmentation with a /tathToTempDatabaseLocation switch & eseutil will use an alternative partition with sufficient disk space available as the temp database location during the defrag process. alternatively, you could copy the databases onto another server/computer with sufficient disk space & run the defragmentation from there as per MS KB244525 Once the Defrag is complete you can copy the exchange EDB & STM files back to the origional Location replacing the existing files. (Be sure to take a backup of the original STM & EDB files before copying the defragmented ones back)