Things You'll Need:
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Step 1
First if you just want to backup your Outlook.pst file, you should use the Outlook 2002 and later backup tool by Microsoft at http://office.microsoft.com/en-us/outlook/HA010875321033.aspx
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Step 2
If you have an earlier version of Outlook you will want to do a search of your computer for the files *.pst. You can do a search by right clicking on the start button and do Search, choosing your C: drive and then searching for the file. The *.pst files include all your personal folders, calendars, etc for Outlook.
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Step 3
Various versions of windows have moved the default locations of your PST files, for example in Vista the typical place for Office 2007 outlook is:
C:\Users\your-user-id\AppData\Local\Microsoft\Outlook
A good tutorial that tells you about your specific folder locations without doing a search is: http://ask-leo.com/where_is_my_outlook_pst_file_located.html













