Hi Everyone,
I did an installation of MobiControl OnPremise v15.6.4
After the Installation I am running into some issues.
I installed the components like this: 
The Management Service is installed on a server in the LAN.
Database and Deployment Server are running on a server in the DMZ.
Now I am running into the following issues: 

Do you got any idea how I can fix the "proxy authentication necessary" issue?
My customer is using a proxy server to access the internet.
We already configured this Proxy under Global Settings --> Global Proxy in the Web Console.
The SOTI Services are unreachable and everything else is green.
I didn't try to enroll a device into MobiControl because it should be impossible due to the unreachable services.
It is planned to enroll Android devices only.
As always thanks for your help!