Once the server with the RMM4 has been set up there is an important step that needs to happen to allow the RMM4 to establish a remote KVM over IP session:
Make sure the desktop display resolution after installing the graphics driver is set to 1440x900 or 1280x1024 before logging off the desktop the final time.
Otherwise the KVM over IP session will show a black screen after clicking the Launch Console button.
This is an especially important step for all servers with an RMM2/3/4!
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book