I have a small site (retro 9.5) with a dozen windows laptop clients (Win 7 & 8), no Open File Agent. We are using Proactive backup with a separate script and backup set for EMail which has Block Level Incremental and Force Backup of MS Outlook Data enabled in the options. A selector looks for .pst and .ost files
Some of the clients gracefully shut down Outlook and backup happily , others do not, and consistently give the usual
Any Ideas?