Spotlight Client connection via VPN

I am currently working from home due to the Corona Virus crisis, I guess that's a pretty common situation at the moment.

For my work I need to I install the Spotlight Client on my local home computer and connect to the diagnostic server within the company's network. The issue is, that I am connected to the network via VPN and my local computer is not part of the Windows domain, i.e. I am not authenticating towards the Spotlight Diagnostic server and the connection get refused. 

Is there a way around or a way to add credentials to the connection information for the diagnostic server (within the Spotlight Client)?