Fix OneDrive Sync ‘Service Unavailable’ and ‘Permission Denied’ Errors - Fix Putty Connection Refused on Port 22-Cloudflare 525 Error: SSL Handshake Failed Fix

Updated 2026-06-14 00:07:04developer-tools
Fix OneDrive Sync ‘Service Unavailable’ and ‘Permission Denied’ Errors - Fix Putty Connection Refused on Port 22-Cloudflare 525 Error: SSL Handshake Failed Fix
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.