Is anyone using MSGraph as an alternative to cfexchange and has run into issues due to access being blocked by conditional access policies? Azure shows no conditional access policies. We believe it could be a misreporting of the error by the server. Our tasks have been running fine since 2023, no changes to the task or the app registration. Any ideas of what can be causing this? Thanks!

This is probably not exactly what you are talking about, but there was a change in granular access controls in the last 12 months, where users could grant permissions to some, but not all, of your requested scopes. Could that be a factor? Where a user denied permissions to a narrow scope while granting access to others and that's causing an access issue?

Thanks Mike. It fixed on its own. This issue has been escalated to Microsoft. We still don’t know what caused it.