Microsoft Outlook categorizes Outlook Data Files into two types: PST and OST files. PST files contain data stored in your personal folders, whereas OST files contain data downloaded off your Exchange ...

Microsoft Outlook may store your Personal Folder files, or PST files, in one of several different locations, depending on which versions of Outlook and Windows you use. It gets even more complicated ...

If you open MS Outlook and see an error message, Outlook is using an old copy of your Outlook data file (.ost), then use these fixes.

Chris: After upgrading to Outlook 2007, I get a data file error every time I open Outlook. The exact error message I see is "A data file did not close properly the ...

Using multiple .pst files woudl be my goal, I guess, but in the accounts section (unless I'm missing something) only allows you to change the data file used for *all* accounts.<BR><BR>Right now, I'm ...