Cannot access Microsoft Outlook.

Dear Andy Benson,

To ensure I understand your request correctly and to support you as effectively as possible, I need more specific information from you:

Are you using Outlook on Windows or the web?

What happens when you select More Details?

Could you share a screenshot of the issue code (please remove personal information)?

Does the issue affect only your account, or are other users affected?

Can you access Outlook using a different browser, device, or network?

When did the issue start, and does it occur consistently?

In the meantime, if this occurs in the Windows Outlook app, kindly try to run the Microsoft 365 Sign-in troubleshooter, which can diagnose and automatically fix several common Microsoft 365 authentication problems.

Your provided information will help me assist you more promptly and efficiently.