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- For this Azure AD sign-in error, have we checked the Azure Sign-ins log to track the sign-in information?
It's recommended that we could get nice insight and particularly detailed Sign-In Details if you use Azure Monitor:
https://video2.skills-academy.com/en-us/azure/active-directory/reports-monitoring/howto-analyze-activity-logs-log-analytics - Here is an excellent CMG guide for you to refer to:
https://systemcenterdudes.com/setup-and-configure-sccm-cloud-management-gateway-1806/
Note:This is non-Microsoft article just for your reference.
Have a good day!
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