How I fixed a corporate laptop that lost DNS after disconnecting from VPN

I'm sharing a field experience in Ops & support. I had been working with internal support for hybrid users who jump between the office, home, and VPN when a laptop appeared that would connect to the VPN, but upon disconnecting, it would no longer resolve printers or the intranet. The symptom that made me investigate it seriously was that ipconfig showed old DNS, Teams remained online, and the…