Hi @Anonymous ,
please go ahead with the following URL:
Get an activation code
If that not work please let us know.
Regards

Thank you very much, but i tried already this way. I have to complete my serial number, i fill that serial number that i used first but it doesn`t work.
Hi @Anonymous,
What product are you trying to activate?
Is it subscription or perpetual?
If subscription then look to http://manage.autodesk.com/. Go to products and services then click on a product - if the app says 'sign in' then you have to use your Autodesk ID
provide more info
what product & version?
DarrenP
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It`s about Autocad 3D Map 2014