- Third-party Outlook plug-ins are installed.
- Mismanagement of low-level folder editors occurs. This includes folders such as Microsoft Exchange Server MAPI Editor (MFCMAPI).
- Memory corruption or disk corruption occurs.
For Microsoft Outlook 2013 and Outlook 2010
- If you haven't already done this, connect to the mailbox by using Outlook.
- Close Outlook, and then run outlook.exe /resetfolders.
Article ID: 2939487 - Last Review: 29 Dec 2016 - Revision: 1