How to use SQL Server Management Studio (SSMS) to access Windows authenticated databases across a VPN

(i.e. Remote SQL with SSMS on VPN)

Imagine you're on a "work from home" computer, connected over a VPN to a client network (perhaps using a software or hardware token)

You open SSMS -- and can't see how to connect via "Windows Authentication" to a machine on that network.

The trick is to launch SSMS.exe with runas, specifying /netonly and a domain\user combo.

runas /netonly /user:THE_DOMAIN\THE_USER "C:\Program Files (x86)\Microsoft SQL Server Management Studio 18\Common7\IDE\Ssms.exe"

What is the parameter /netonly ?

netonly

use if the credentials specified are for remote access only.