Fix 'Cannot Connect to Exchange Online' in PowerShell - Fix FFmpeg Audio Out of Sync in MP4 Files-OneDrive Connection Refused: Proxy Fix Guide

Updated 2026-06-18 23:47:51security-tools
Fix 'Cannot Connect to Exchange Online' in PowerShell - Fix FFmpeg Audio Out of Sync in MP4 Files-OneDrive Connection Refused: Proxy Fix Guide
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.