Planning for the end of Microsoft Dynamics AX 2009 & 2012 mainstream support: Extend, upgrade, or pray?
Microsoft has announced that several upcoming support deadlines for Dynamics AX 2009 and AX 2012. All Microsoft products have a lifecycle that begins when the product is released and ends when it's no longer supported. Dynamics AX products are normally supported for 10 years from the release date.
For exact dates of AX 2009 and 2012 releases and support details, you can check out this post.