Check if the SCCM Client is able to talk to Management Point or not.

Check if the Client is able to talk to Management Point or not.
Bellow link should give you blank page:
" http://<SCCM_SERVER/SMS_MP/.sms_aut?mplist "

Bellow link should give you some random numbers:
" http://<SCCM_SERVER/SMS_MP/.sms_aut?mpcert "