Symptom: System Administrator role from the MS user DataIntServiceUser in the Production environment has been removed, causing disruption in the dual write integration. The issue of missing roles on the MS user is crucial for system functionality.

Cause: it seems that this is a bug from Microsoft.

Solution: Create Support ticket for enabling the admin role for current user ID "DataIntServiceUser"

Ideal: Adding a class that could be run to readd default roles to MS users if they are missing. That way if it happens, the issue can be automatically fixed.