“Activation verified” is often a lie. Cracked software frequently crashes, corrupts save files, or fails to export properly — a disaster for professional CAD work.
So I've used the trial, decided to buy it and once I received all 3 of the emails from AutoDesk I then input the relevant numbers. Autodesk Community, Autodesk Forums, Autodesk Forum AutoCAD LT 2015 cannot activate - Autodesk Community
If you need to activate Autodesk Inventor LT 2015 legitimately, you should use the following official channels: