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According to your description, it sounds like you’re experiencing a persistent issue with an old Outlook account that’s preventing you from signing into your new account. Here are some steps you can try to resolve this:
- Check for Cached Credentials: Sometimes, even after uninstalling an app, the credentials might be cached. You can clear these by going to the Credential Manager in Windows and removing any saved credentials related to the old Outlook account.
- Disconnect your accounts in Windows Settings. Click the Start button, and then click Settings. Click Accounts, scroll down, and then click the Microsoft account you would like to delete. Click Remove, and then click Yes.
- Remove the Old Account from Outlook: If you’re using the classic Outlook for Windows, you can remove an account by going to File>Account Settings>Account Settings>Select the old account and then choose Remove.
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