
OneDrive Sync Proxy Error: Troubleshooting Checklist
If you see 'Proxy error' or 'Cannot sync' in OneDrive while connected through a corporate or home...

If you see 'Proxy error' or 'Cannot sync' in OneDrive while connected through a corporate or home...

You try to open a website in Firefox and see a full-page error: "Secure Connection Failed" with a...

If you cleared the OneDrive cache to fix a previous sync issue, but now OneDrive is stuck on 'Pro...

You open Windows Security, go to Virus & threat protection, and see that the Real-time protection...

You installed a task scheduler alternative on your Mac—maybe LaunchControl, Lingon, or a cron GUI...

You open Outlook in Microsoft 365 and see a '404 Not Found' page. This usually means Outlook can'...