SCCM 2012 R2 : Call to HttpSendRequestSync failed for port 80/443 with status code 500, text: Internal Server Error

Today a customer ran into a problem with SCCM 2012 R2. Clients didn’t get online and packages didn’t get distributed. After some investigationn I found the following problem internal Server error. As you probably know SCCM 2012 clients use HTTP or HTTPS (internet, PKI) to communicate with the SCCM server. This is how you can test this :

Test with the following urls in you browser :




You should receive a return with your SCCM server name and capabilities etc.

I didn’t and after some investigating I decided to reset the SCCM site. This is how you do that :



First open Configuration Manager Setup by installed programs (not starting the setup from the DVD!)


Choose next.


Choose the perform site maintenance or reset this site


Choose reset site with no configuration changes.

Now wait for 15 minutes and after that try it again. It can take some time before everything is set and up and running again.

SCCM 2012 Site Status Critical Component Server

While configuring a SCCM 2012 R2 server I noticed some Critical errors in the Site Status.
After some investigating I found the problem how to fix this. You must add the SCCM service account and the computer account(s) to the local administrator group of the site server.


Go to the local users and groups and add the SCCM service account and the computer accounts to the the group. (You manually have to tick the computer box to enable to add computers)


When this is done you noticed that the services are on green again :