If you’re experiencing SMS_MP_CONTROL_MANAGER message 5438 on a ConfigMgr 2007 that is in native mode, check the bindings on the default website in IIS. It should be set to use HTTPS (443) with the SSL cert field set to use that server name.
Site status message:
MP Control Manager detected MP is not responding to HTTP requests. The http error is 12030.
Possible cause: MP service is not started or not responding.
Solution: Manually restart the SMS Agent Host service on the MP.
Possible cause: IIS service is not responding.
Solution: Manually restart the W3SVC service on the MP.