Hi @anke hillier ,
You can try the following troubleshooting steps:
- Clear cookies of Microsoft Edge. This account seems to be stored in cookies, so you can see this account every time. To clear cookies, you can Edge settings --> Privacy, search, and services --> Clear browsing data.
- Check whether this account is logged in at Email & accounts in System settings. If you can find it, just remove it.
- Check whether this account is logged in at your Edge profile. If you can find it, just remove it.
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Best Regards,
Shijie Li