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How to Fix Outlook 'Command Not Found' Error - Windows Security Error 0x80073b01 Troubleshooting-Extension Host Terminated Unexpectedly Fix

Updated 2026-06-14 09:06:46developer-tools
How to Fix Outlook 'Command Not Found' Error - Windows Security Error 0x80073b01 Troubleshooting-Extension Host Terminated Unexpectedly Fix
Prepare
Execute
Validate
Document

Operational follow-up

  • Record the exact option, command, or setting that changed the result.
  • Keep a rollback note if the workflow affects shared files or team settings.

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