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Fix Outlook 'Connection Refused' Error During Exchange Server Setup - How to Unstick Windows Security Scan at 99%-Resolve OneDrive Sync Problems Caused by Windows Update

Updated 2026-06-14 03:29:13office-tools
Fix Outlook 'Connection Refused' Error During Exchange Server Setup - How to Unstick Windows Security Scan at 99%-Resolve OneDrive Sync Problems Caused by Windows 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.