The reason for not knowing the proper keyboard shortcut might also explain why this is a "panicked" session.

The keyboard shortcuts don't work in a less-than-fullscreen terminal server session. That's where a lot of my admin work happens, and having to hover over that corner sucks.

Keyboard shortcuts like Alt+Home(Start Screen) and Ctrl+Alt+End(=Ctrl+Alt+Del) should still work.

That only appears to work through one level. Right now I'm remote-desktoping a physical computer and have a Hyper-V VM open on that. Alt+Home will pass through to the VM only if the remote-desktop session to the host is full-screen.

Or perhaps keyboard shortcuts don't work so well when accessing the server via vSphere Client console running in an RDP session.