Method 1
Step 1: Exit Outlook and start the Inbox Repair tool
Step 2: Repair the .pst file
In the Inbox Repair tool, type the path and the file name of your personal folders (.pst) file or click Browseto locate the file by using the Windows file system, and then click Start.
Note If you do not know where the .pst file is located, follow the steps in How to locate, move, or back up your .pst file.
The Inbox Repair Tool may need to be run several times in order to fully repair your personal folder (.pst) file.
The Inbox Repair Tool cannot repair every problem that is detected. In some cases, items may not be recovered if they were permanently deleted or corrupted beyond repair. Method 2