Hi,
Thank you for the details. To better understand the issue and guide you properly, could you please clarify the following:
- Do you have a Microsoft subscription? If yes, what type of subscription are you using (e.g., Microsoft 365 Personal, Family, etc.)?
- Is the issue happening only with Outlook, or does it affect other Microsoft products as well?
- Are you trying to sign in using the Outlook app? If yes, are you using the new Outlook or the classic version, or are you accessing it via a web browser?
- Is your second laptop running Windows or macOS?
- What is the exact error message you receive after the login attempt fails? in the meantime, try using a different internet connection, then open an InPrivate window(Ctrl + Shift + N) in your browser and try logging in to your account using the link below: https://account.microsoft.com/ Can you log in there?