Hello Stephen,
I’m glad you reached out and I understand how frustrating it must be when your Edge Workspaces suddenly stop working, especially after they had worked flawlessly for years. It sounds like the issue could be related to account sync or legacy directory mappings especially since you mentioned older Hotmail accounts and failure even when trying a secondary Outlook account.
Often this issue arises when the workspace data stored in OneDrive becomes corrupted or stuck due to migration or legacy account structures. In one helpful troubleshooting case it was resolved by deleting the Apps\Microsoft Edge\Edge Workspaces folder in OneDrive which cleared conflicts and allowed the workspaces to load again.
To resolve this begin by ensuring you’re running the latest version of Microsoft Edge and that sync is active for your account. Signing out and back in frequently restores sync and workspace functionality. If that doesn’t help navigate to your OneDrive’s Apps\Microsoft Edge\Edge Workspaces folder and move or delete it Edge will recreate a fresh one on your next sign-in.
As an alternative try installing an Insider channel version of Edge (Beta, Dev, or Canary). Some users reported that logging into the Insider build allowed the workspaces to synchronize correctly and then the regular version began working again.
If the problem persists please submit feedback directly through Edge (using Alt+Shift+I) so Microsoft can collect data and escalate a fix from their end.
Does that approach to cleaning up OneDrive and refreshing sync make sense given your setup?
I hope this answer is helpful if you have further questions feel free to reply back
Regards,
Marcelo