Does anyone know where I can find documentation for Microsoft Dynamics AX 4.0? It reached its end of life on 2016-10-11, and MSDN no longer contains documentation for this product.

The Microsoft Dynamics AX 4.0 content has been retired from TechNet and MSDN. For more information, see:

  • Microsoft Lifecycle Policy
  • Supported upgrade paths to Dynamics AX 2012

I've been able to find the Quick Reference Guide, but that doesn't contain the technical information I need. Specifically, I'm looking for the AX 4.0 equivalent of this AX 2012 guide: Deploying Customizations Across Microsoft Dynamics AX 2012 Environments. That document relies on AXUtil.exe, which does not appear to exist in AX 4.0.

1 Answer 1


I'm not sure I've ever seen a real equivalent of the guide you linked to for AX 4.0.

If I remember correctly, for moving AX 4.0 customizations to another environment, you have two options: Exporting and importing .xpo files or copying layer files. AXUtil.exe was introduced with AX 2012 to (among other things) work with models, a concept which did not exist in earlier versions.

For working with .xpo files, you can look at the AX 2012 documentation (e.g. How to: Import Application Objects by Using the AOT), the basics haven't changed much.

Layer files can be found in the program application folder, have the .aod extension and contain the source code (and other stuff) in a binary format. See Where are the source files of AX stored? and Application file extensions.

You might be able to find some of the lost TechNet and MSDN documentation for AX 4.0 with the Wayback Machine, e.g. Dynamics AX 4.0. Or go old school and buy some books, e.g. Inside Microsoft Dynamics AX 4.0, which is fairly comprehensive and considered by many as The Book on Dynamics AX.

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