Источник:
http://axstart.spaces.live.com/Blog/...C0A0!250.entry
==============
It is possible to Debug AX by using the AX.net connector. Even if we communicate with an AX webservice.
1. Create your breakpoint in AX with the same user you are connecting AX from Visuals Studio. You have to do this by typing the word breakpoint in your code.
2. Start the AX debugger manual
3. Run your C# code
4. AX will stop at the keyword breakpoint in the Debugger.
This also works for AIF (place breakpoint word at method in the AXDclass of the interface
This also works for the Enterprise portal.

Источник:
http://axstart.spaces.live.com/Blog/...C0A0!250.entry