Autodesk’s activation servers for 2017 are offline. Solution: Use the trial mode only. Do not enter a serial number. If you own a perpetual license, you must use the "License Borrowing" feature or stay offline during activation.

: Students and educators are also limited to the current version plus three years back for new installations. Legacy Licenses

As the software installs, he reads about the new features like a kid reading a comic book:

: If the version isn't listed, some users have found success using the Autodesk Assistant/Virtual Agent to request specific older installers. Autodesk Community, Autodesk Forums, Autodesk Forum Key Features introduced in AutoCAD 2017