The Dynamics AX In-Market Engineering team released Cumulative Update 8 for Microsoft Dynamics AX 2012 R3 (6.3.1000.309) with KB2998197 on Nov 17, 2014. This release includes all previously released cumulative updates for Dynamics AX 2012 R2 plus additional hotfixes, regulatory updates, and enhancements to existing business processes. Cumulative update 8 is the first cumulative update for Microsoft Dynamics Ax 2012 R3. There were no cumulative updates numbered 1 - 7 for Microsoft Dynamics AX 2012 R3.
Before you install this cumulative update package we recommend that you read the CU8 install guide.
Cumulative update 8 is also available for download via the LCS updates page found here: https://update.lcs.dynamics.com/Download/Index/793717
Additionally, see the following videos:
Microsoft Dynamics AX 2012 R3 Update Experience
How to merge code automatically after applying an update in Microsoft Dynamics AX 2012
For more information on Microsoft Dynamics AX 2012 R3 CU8 release, please refer to KB2998197.