We have been trying for some months to synchronise two sets of Outlook pst files, but without success. We tried many programmes and found that they were "buggy", could only sync a whole pst file (without the selectability of folders to sync), did not correctly sync both ways; could not even start(!); created duplicates - often times; was not schedule-able; is easy to setup and use..
These are some of the vagaries we have evaluate - I will not elaborate of the relative merits / demerits of programmes suffice to say that we have settled upon and registered SyncPst for Outlook. So if anybody wants to action our recommendation do a "Google" on that name - it's a good prog.