DOINC / Connected Cache Proxy Issue

Hi,

I'm evaluating MCC for our environment.

The Problem is that MCC uses our Proxy but sends the wrong URI in the GET Request.

It omits the whole Host Part. In the Host Header it is set correctly.

I have a Screenshot of the Wireshark Packets from MCC (left) and Internet Explorer (right) which both request the URI http://b1.download.windowsupdate.com/mscomtest/cedtest/r20.gif

As you can see the from MCC does not contain the Protocol or the Hostname of the Server.

The Request from Internet Explorer does contain it

The Response from the Proxy Server to the MCC Request looks like that

The Version of the DoinInstall.exe is 1.5.4.1512

I have found the thread https://techcommunity.microsoft.com/t5/configuration-manager/doinc-connected-cache-and-proxy/m-p/1046535 from hjeppesen but this was more a general Problem, that at the time he tested it, the MCC had no Proxy Support.

Regards Marco