Excel with Dynamics 365 connection - Cannot refresh

Hi ntheam ,

1. Try clearing your browser's cache and cookies to see if this resolves the issue.
2. Try update the browser and the Excel.
3. Try disabling the options here and see if that allows the login window to render correctly. Please note, this step involves security settings, so proceed with caution and consider re-enabling protected view after testing.

If after trying these steps, you're still facing the issue, it might be helpful to gather more information to further diagnose the problem:

1. Have there been any recent changes to your system or network configuration that might coincide with when the issue started?
2. Are you able to log in to Dynamics 365 through a web browser without any issues?
3. Is this issue occurring for other users as well, or is it isolated to your machine?

Best Regards,
Gao
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

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