If you purchased AutoCAD 2014 before Autodesk discontinued perpetual licenses, you can:
Autodesk allows transfer of perpetual licenses between users under specific conditions. You may find legitimate sellers offering transferred licenses, though this requires careful verification.
Prerequisites:
Steps:
Choose activation method:
Complete activation – your software is now ready for legitimate use.
If you're looking to understand the process for educational purposes or you're a student looking to learn about software activation (while intending to use legitimate methods), here's a very generalized overview: Xforce Keygen AutoCAD 2014 How To Use
Activation: