When indexing in Microsoft Outlook never completes and keeps restarting on every session, there may be a problem with the indexing service or the Outlook data file may be corrupted. There are a few things to do to troubleshoot and find out where the problem is.
One of the first things to do is to enable logging of indexing results:
- Registry Location: HKCU\Software\Microsoft\Office\xx.0\Outlook\Search where xx is the Microsoft Office version.
- DWORD Key: EnableLogging
- Value: 0xffff0000
- Log File Location: %TEMP%\outlook logging
- Check Event Viewer for Error ID 29 to 37.
- Review settings in “Indexing Options”. You can search this application using the Windows Desktop Search function.