I am having a problem with users outgrowing the data file size limit of their local Outlook .pst file of 2 gig. We do not use Exchange Server, just call to a POP3 account. With each upgrade in the Outlook client, I just transplanted the existing .pst file by hand into the new installations without issue. Many of these .pst files have been migrated from Outlook 2000 or earlier in some cases, and the users refuse to do housekeeping beyond sent items of more than three years old. All users are now at Outlook 2013.
My understanding is that there is a way to convert these ANSI formatted .pst files to UNICODE, and that would allow the .pst file to be able to be as large as 20 gigs in size. What I don't understand is that there seems to be several ways to do this, both manually via Outlook or with a third party software tool of which there are many to choose from from freeware to professional.
Has anyone had to deal with this issue before with the oversized .pst files and expanding them to 20 gig capacities? This is one of the questions where there appear to be many solutions to "try" with no one definitive working solution. How have you done this without data (archive) losses inside a repeatable procedure?