At the moment, some provisioning activities are logged in the Organization Audit logs but they are not very descriptive. 

ie. Changing the account details and deactivating an account in the IDP is logged as the same activity in Audit log. 

Suggestion 

Provide more details on audit logs based on user provisioning

• Specify that provisioning is the actor. 
• Log specific user account changes.
• Log specific group changes.

Suggestion