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Dynamics Ax 2012 R3 RTM upgrade to Cu12 step by step.

Recently I upgrade the Dynamics Ax 2012 R3 RTM environment to CU12.

You can find official Microsoft guide for CU12 form following link.


Following are my notes during upgrade process.

First step to download patch KB3199741.


This link requires  login to partner source. You have to add email address and then Microsoft send you email where you can download patch.


Second step is to download cu12 silpstream.  For this you have to login LCS .


If you don’t have any cloud environment No issue Microsoft still let you download Cu12 slipstream.

create a new project if there is no project available in LCS.

I create a project with Name test.

Click on it and let the project open and navigate the screen and then click on Update.

From next screen download Cumulative Update 12 sliptream

Download depends on speed of internet. Size of file is round 931 MB.


I copied both patch and slipsteam on required folder and extract both in one folder. First I extract the patch and then extract the slipsteam.




Now I run the AxUpdate



Accept and Continue.




But I face the problem that Visual Studio 2013 Dev Tools are not enable. For it solution I found following link which help me.


In short, I stop the Installation. And do the following steps.

Run the Dynamics Ax 2012 setup and Uninstall the Visual studio 2012 tools.

Install Visual studio 2013 VS2013_U4 on machine.

Download and install Report Viewer 2012 runtime component. You can found it from following link.



After all these step I again run the Cu12 setup and Visual 2013 tools are enabled.

Check this box and click on next.


After that I restart the AOS service. And open the AX client and select option from update check list and select first option.

Let the complete the database synchronize, Compile and Full CIL.

My environment is successfully Upgrade to CU12. Now next step is code merge or code upgrade That is not part of this post.

If you want new installation  direct to CU12. Then copy content of Dynamics Ax 2012 R3 into hard disk and then extract slipsteam to update folder. And run the Default setup. Hopes this will work.









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