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Setup PowerShell Offline Installer on Multiple Computers - Resolve Outlook Sync Lock on PST or OST-Fix Windows Defender Authentication Failed After Update

Updated 2026-06-14 23:54:01browser-issues
Setup PowerShell Offline Installer on Multiple Computers - Resolve Outlook Sync Lock on PST or OST-Fix Windows Defender Authentication Failed After Update
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.