No replies that I have seen or read.
I came from running version 8.x with AOFO and didn't have any problems backing up PST files. That was one of the big reasons for buying the AOFO option.
I am wondering if the problem rests with the snapshot method used. I was having no luck with having it automatically select with method, but since selecting the Symantec snapshot, I have had a few cases where it backed up the PST files properly. I am wondering if it is the network conditions that is the critical factor, if there are conditions that prevent a good snapshot being taken, that is preventing the PST files from being backed up while in use.