You could stop all SOAP requests from taking effect by setting the operation counters to zero in the Access Control tab in the default SOAP Web Services Policy (Admin tab, Web Services Policy, Policies). According to the Help, "The default value of -1 in any operation counter indicates that no restrictions apply to the corresponding operation. A value of 0 (zero) indicates that the corresponding operation is not allowed." I imagine you'd need to restart the Service Desk service to have that setting take effect. However, that would also stop PAM from doing anything with the SOAP service, so it might be too much of a blunt instrument. A subtler approach, anyone?