Hi!
You mentioned that you signed out of your Microsoft account on all devices. Regarding your computer, did you sign out and sign back in within the browser, or did you also do so in Windows?
If you haven't done this in Windows, sign out and sign back in to your account to resolve synchronization issues like these:
- Open Windows Settings > Accounts > Your info > Under Microsoft account, click Sign in as a local account.
- Click Next > Enter your email or Windows login password.
- Enter your user information > Next > Sign out and finish.
- After unlinking your email account from Windows, restart your PC > When it starts, relink your email account.