Losing communication to network printer

I was hoping to set this up at a client’s home office. I added his two machines and they were able to see one another on the private tailscale network, but at the same time, they were no longer able to access network resources such as printers.

I checked with /ipconfig and it appears the only network connection showing was the tailscale IP/subnet and the connection to his LAN ( was no longer connected which would be consistent with the issue.

Where have I misconfigured? This application seems dead-simple.

Are you using any exit nodes, or subnet routers? Have you rebooted (I have had multiple nodes not work until rebooted)? What shows in the Windows Network Connections configuration panel?