Hi Hendri,
To help us narrow down the issue, I’d like to confirm the following things:
1. Which plan are you using?
2. Does this issue only happen on Outlook and Excel?
3. If you click ‘remind me later’ and ‘continue’, you can use these applications normally and the dialog box will never pop up again, right?
4. Do you try using other accounts to test the issue?
5. When does the error message pop out, once you open the application?
Thanks,
Dunk