I have an account that does not support sync, but the browser show a login button next to avatar, and it says "We need confirm it's you, ..., please sign-in again to sync", this is not exact text shown to me because i don't use English in my browser.
But, the sync button did not respond to me, and no sign-out button available for that profile, only delete profile was there, and i can't delete it because this account's data did not sync at all.
I have report this using the feedback, but is there any tricks to fix this before MS take action?
It will show "This account did not support sync" in the past, now it says "We can't sync to your account since we need to confirm that it's you. Please sign in again to verify your account." after login, did a fresh install also did not work.
I could see "EDGE_AUTH_ERROR: 3, 13, 0" in edge://sync-internals
This account was managed by O365 Business Premium which does not support Active Directory Premium, so it did not support sync but should able to login.