

See Disable Add-in or uninstall the software.Īdd-ins | How to Disable Add-ins | Other Causes | Developer Information | Tools | More InformationĪntivirus programs that support scanning email for viruses will tend to keep Outlook open. However, the culprit on your computer may be a different program.


This list is intended to give you an idea of what types of programs will cause Outlook to remain running, most often Fax software, anti-spam or anti-virus software, or PDA sync software. This should eliminate most of the problems with Outlook not closing and the need to check the *.pst file on the next start in addition, newer versions of Outlook are "better" about checking the data file for errors.īelow is a list of software known to cause problems in all versions of Outlook. Please note, this applies only to profiles with an IMAP account.īeginning with Office 2007 SP2, Outlook addresses the problem and forces Outlook to close (most of the time), but you may need to wait a few minutes. If you don't want to edit the registry, I have a ready-to-use registry file available. HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\IMAP There is a registry key to use as a workaround. If you use an IMAP account in Outlook 2016 and newer, Microsoft is investigating an issue where outlook doesn't close properly. Select the Processes tab and look for Outlook.exe in the Image Name column. Not sure how to open Task Manager? Right click on the Windows Taskbar and choose Task Manager.
