Consider the following scenario:

• You are running Microsoft Office Outlook on a Windows Vista-based computer.
• You are using a Personal Folders File (.pst file) that is stored in a folder.
• The folder is redirected to a server.
• The .pst file is cached locally by Client-Side Caching (CSC).

In this scenario, when the client computer synchronizes the cached .pst file with the server, you cannot access the .pst file.

Note: The client computer may access the .pst file when an Outlook rule runs or when the AutoArchive feature runs. Also, the client computer accesses the .pst file when you click the messages in the .pst file.

When this issue occurs, you have to remove and then re-add the .pst file. Or, you have to close and then reopen Outlook.