Enrollment Point Control Manager detected Enrollment Point is not responding to HTTP/HTTPS requests. The http status code ...

%11Enrollment Point Control Manager detected Enrollment Point is not responding to HTTP/HTTPS requests.  The http status code is %1.%12

Possible cause: IIS service is not responding. 
Solution: Manually restart the W3SVC service on the ENROLLService.

For more information, refer to Microsoft Knowledge Base article 838891.
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