If you receive an error message when attempting to switch between folders, you will need to locate the .pst file currently being used and run the Inbox Repair Tool on the file.
The error message displayed for this type of problem is: "Errors have been detected in PST file. Quit all email enabled applications and run repair tool."
The .pst file that is currently being used must be located before running the Inbox Repair Tool.
In the Folders List, right-click Folders - your name.
In the pop-up menu, select Properties for “Folders - your name.”
In the Mail Folder Properties window, click the Advanced... button.
In the Sun Java System Connector for Microsoft Outlook properties dialog, select the Advanced tab.
In the File Path field under the Store section, note the path provided. This is the path where the currently used .pst file for your Outlook profile is located.
The Inbox Repair Tool (scanpst.exe) is a tool designed to help repair problems associated with Personal Folder (.pst) files. In addition, the scanost.exe tool is used to repair offline folders (.ost) files. The Inbox Repair Tool automatically installs during the Outlook setup. These programs are typically located in one of the following folders depending on your Outlook version:
Outlook 2000: Program Files\Common Files\System\Mapi\1033\NT\
Outlook 2002 (Outlook XP): Program Files\Common Files\System\Mapi\1033
Outlook 2003: Program Files\Common Files\System\MSMAPI\1033
If you cannot find scanpst.exe in any of the above paths, perform a search for the file.