We have a problem with very large OST files of outlook. What we do is archiving the mails from the Exchange Server with a 3rd party software and delete them from the Exchange server afterwards.
Nonetheless the OST file size stays the same.
Do I really need to put the server in Maintenence mode (I have a technet article that details that over like 20 steps, or is there a faster method to accomblish that task?