Wish I could help, not sure who all uses it for work here but hopefully more than just us two or you might be out of luck. I used it a LOT both for work and home, until I switched to Solidworks at work at my last job, and either fusion 360 or sketchup at home (some shit I made didn't need full cad to make simple stuff).
But I remember getting 2012 AutoCAD on another machine a full days worth of googling, cursing at it, downloading iffy files from random websites that screamed 'virus' but luckily wasn't. And all that was for 2012 yarr version to get it fully working.
I gave up on moving the legit copy to a new machine after 2 days of trying. There may be a way, some CAD sage here knows. But even the older Yarr version of 2012 was f'ing rocket science to get working with file replacement, patching files, editing non text based files in hexedit to match some machine ID you needed to generate with one of those chip tune music playing code generators from back then, and all kinda of Rube Goldberg like steps to follow.
-We don't control what happens to us in life, but we control how we respond to what happens in life.
-Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times. -G. Michael Hopf
Disclaimer: Post made by me are of my own creation. A delusional mind relayed in text form.