And his trial version of AutoCAD 2016 had just expired.
Released over a decade ago, AutoCAD 2016 introduced several critical enhancements that are still relevant for users maintaining legacy projects: Improved Visual Experience: xforce autocad 2016
If you have a valid license but lack internet access, you can request an activation code manually through the Autodesk manual activation page . And his trial version of AutoCAD 2016 had just expired