Always Trying to Learn
wrote:

How large can a 2003 pst file get and still be safe?

20GB is the minimum maximum size and that size can be made larger via
registry settings. Peter is thinking of Outlook 2002 and earlier PSTs.

How many pst files can be open at the same time?

I don't know, but I do know people who have 10 open at once.
--
Brian Tillman [MVP-Outlook]