Ok thanks
Did you create a UEM config file to save the .OST/.PST file with UEM ? If not, could it be then, that every time you start Outlook, the PST/OST files is created (Preparing Outlook for first use) ?
The best way is to redirect your .OST/.PST file to the network or home directory of the user.(so if possible, try to find out why Outlook is ignoring your redirection)
Raymond