You can rebuild the Office database by using the Microsoft Database Utility. If Office detects a problem with the database, it automatically runs the Database Utility. For a list of problems that may indicate your database is damaged, see About the Office database.
Before you rebuild the Office database, make sure the problem isn't the result of a damaged or fragmented hard disk. To do so, run a disk diagnostics and repair application, such as Apple Disk Utility. For more information about how to identify and repair hard disk problems, see the documentation for your disk utility application.