When a case creation rule is activated, a corresponding workflow is created automatically. If you create or assign a rule, you must have permissions to perform the same action on workflows. The case creation rule is applied and a case is created in context to the permissions that the owner of the case creation rule has.
Note: A workflow can only be activated or deactivated by the workflow owner or by someone with the Act on Behalf of Another User privilege such as the system administrator.
Reference:
https://docs.microsoft.com/en-us/dynamics365/customer-service/automatically-create-case-from-email