How can an experienced software guy transit his career in to Ms Dynamics ax 2012 technical consultancy? What are the routes?

As understood form your question, The answer is there are tow types from servers : Server license covers one instance of application server (AOS) and the whole business logic of Dynamics AX. More AOSes logically require more server licenses.  Client Access Licenses (CAL) are divided to two basic types:1-User CAL – license for a concrete, named user2-Device CAL – license for a device, which can be used by various users.(Copy rights to http://dev.goshoom.net/en///dynamics-ax--licensing/) you can review for more details info.)