Mainstream support ending for Dynamics AX 2012 RTM, R2
NOTE: As detailed on the official Microsoft Lifecycle policy page, Microsoft Dynamics AX2012 and AX2012 R2 will reach end of mainstream support on October 9th, 2018. https://support.microsoft.com/en-us/lifecycle/search?alpha=dynamics%20AX%202012
Additional detailed information and FAQ can be found here. https://docs.microsoft.com/en-us/dynamics365/unified-operations/fin-and-ops/get-started/mainstream-support-ax-2009-2012
Extended support definition is found here: https://support.microsoft.com/en-us/help/14085
For Dynamics AX 2012 products, there is no extended hotfix support offered.
The announcement for Dynamics AX 2009 is here: https://blogs.technet.microsoft.com/dynamicsaxse/2018/01/11/dynamics-ax-2009-sp1-ending-support-in-2018/