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Fix OneDrive Sync Error 'Version Mismatch' on Windows 10 - Fix 'Outlook Service Unavailable' After Disabling Firewall-Resolve Error 1069 in Task Scheduler

Updated 2026-06-14 00:12:03macos-help
Fix OneDrive Sync Error 'Version Mismatch' on Windows 10 - Fix 'Outlook Service Unavailable' After Disabling Firewall-Resolve Error 1069 in Task Scheduler
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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