Environment : Central Sandbox
In Zuora Revenue under Securtity - Roles , there is a field Active From aganist each User Role. When there is a change done to that dates. The standard Audit Trail report does not capture the changes as to know what/when/who changed it.
It is a product gap at present for the Customer who is enabled with Unified Authentication.
Moreover the User management is fully controlled at Zuora Billing, so the modification happens at Zuora Billing does not get reflect in Zuora Revenue User roles.
This issue is no longer seen if the customer is using ONE ID integration instead of Unified Authentication.
Audit Trail report would not show the changes took place in User Roles' fields like Active From/Active To.