Our Pri1.stm file double its size in one night (16GB To 38GB) and it also create some .IFS files at the same time.Does anyone have anyexperience with this problem? Thanks, Jerry

the stm file is basicley the "non-text" part of the exchange database. attachments are usually the culprit when these files grow. check to see if user mailboxes have changed. it is also possible that a user dumped a large (or several) large file into their inbox for storage.

Thanks for your reply, Mike. I have checked all the mailboxes and didn't find any abnormal activities.