Open SQL Server Management Studio and open the Vantage->Programmability->Assemblies tab. In this tab will be an entry for: Telestream.Soa.Data.Programmability.
Right click on this and select properties. We would like to know the value that the 'Permission Set:' is set at.
If the value is set to External Access; have them change it to SAFE.
(Once this is done, it should be possible to remove the sysadmin privilege.)