In this video I walk through a basic process of creating a custom service. This is a good method for exposing some business logics that you want to call from another application into Dynamics AX for integration purposes.

If you wanted to skip some of the work I posted another post here with the download and setup.

Custom service setup files

This was done on Dynamics AX 2012 R2 but the same concept applies with any version of AX2012.

Cheers

Lachlan