Hi,
I'm going to run through a few steps with you. Some of these are diagnostic — they help me narrow down what's wrong, not fix it outright. So if nothing changes after a step, that's normal and expected, not a dead end. I'll keep going until we've got this resolved.
Please try this, and let me know if it works, my community colleague suggested that in a Reddit thread and it worked.
Try this, please.
Press Windows + R, type %localappdata%\Microsoft, and press Enter.
Delete the Olk and OneAuth folders.
Restart Outlook.
This only removes temporary Outlook data that will be recreated automatically. Please try reconfiguring the account and let me know.
I’m eager to hear back and work together to find a solution.