Нет. Поддерживаются не две последние версии, а 5 лет или 2 года с момента выпуска следующей версии. Уже год как поддержка четверки закончилась.
Цитата:
Dynamics AX 4.0
Mainstream Support End Date 10/11/2011
Extended Support End Date 10/11/2016
http://support.microsoft.com/lifecycle/?p1=11661
Цитата:
Business and Developer products
Microsoft will offer a minimum of 10 years of support for Business and Developer products. Mainstream Support for Business and Developer products will be provided for 5 years or for 2 years after the successor product (N+1) is released, whichever is longer. Microsoft will also provide Extended Support for the 5 years following Mainstream support or for 2 years after the second successor product (N+2) is released, whichever is longer. Finally, most Business and Developer products will receive at least 10 years of online self-help support.
http://support.microsoft.com/gp/lifepolicy