The following Miscrosoft tools are helpful in troubleshooting Outlook issues:

- Outlook Configuration Analyzer Tool (OCAT) - This tool looks for Outlook configurations that have historically been potential sources of problems in Outlook.   

Please see the following KB article for Microsoft's recommendations on folder sizes.

- Calendar Checking Tool for Outlook - This program checks your Microsoft Outlook Calendar and items for problems or for potential problems.

Article number: 
Last updated: 
May 23, 2016