The Dynamics AX brand has been officially retired by Microsoft. As of July 1, 2017, new customers will not be able to buy Dynamics AX 2012 R3.
Existing client still extended and renew their license. But After 1 July new customer only purchase Dynamics 365 for operations. There is possible release of on premise Dynamics 365 for operations in second Quarter and most probably last quarter of 2017. cover the gap for those who want to purchase dynamics ax instead of Azure or cloud version.
Specially middle east, Pakistan and India market Business owners wants on premise version. Support for existing Dynamics Ax will be continue till 2021.
Existing 2009 version client who wants to upgrade will migrate to Dynamics 365 for operations.
Dynamics Ax brand was originally created in 2006 for AX 4.0 will be closed in July 2017.
Reference : https://ax-dynamics.com/article/the-official-end-of-dynamics-ax