Problem:
You receive an error message: 'MSPST MS not available (check code 4)' while Exchange Folder level backup
Cause:
This is because some information neccessary is missing.
Solution:
Open the following file in notepad: c:\windows\system32\mapisvc.inf
Make sure the following information is under the appropiate section:
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BackupAgent: Error when enabling Exchange Folder Level 'MSPST MS not available (check code 4)'
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