I hope someone can please help, as I am desperate.

1) I am using Outlook mainly to store my address book (ie address,
phone numbers emails addresses etc). I now have more than one copy
of outlook.pst probably due to transferring data from another machine.

I believe that the data contained in each copy is near enough the same
with some just a few discrepancies. However, I am not sure which copy
has the most up-to-date information since I have managed to open them
altogether (see point 2 below) and the "save date" is the same for all
the different outlook.pst.

Here is my question. Is the any way I can get to compare the data
stored within these different outlook.pst files so I can isolate the
exact differences in the data stored within each?

2) In trying to solve the above problem I have also managed to link
all the outlook.pst files to each other some how by using "TOOLS -
OPTIONS - MAIL SETUP" tab within outlook. How can I undo this?

3) Also "TOOLS - OPTIONS" on now grey and cannot be selected. How
can I undo this?

Thanks in advance for you help on this,

Cesar Sassoon