Under computer properties - Remote, the option to enable remote desktop is greyed out, and we can't RDP to the box. The first time we saw this it was on a Win2K3 server with no SP.

To enable Remote Desktop in Windows 11/10, you have to check a few settings and enable them. The first setting is to check whether Remote assistance is enabled or not.

Method #4: Enable Remote Desktop using the PowerShell If you prefer to use the Windows 11 Powershell instead of the Command Prompt, here’s what you need to do: ...

Doing this requires that the Remote Registry service be running on the remote machine, which it is by default for Windows XP and Windows Server 2003. If you’ve disabled this service for security ...

I'm looking at my box's now and out of 7, only 2 show the Remote tab. However, I can't see whats differnt in the setup, policies or sucurity between the machines.

There are several ways to disable or enable Remote Desktop Connection in Windows 11/10. Eg. Windows Settings, Control Panel, Hotkey, Explorer, etc.