What are ADO files ?
ADO stands for Application Data Object and holds the application code for a
layer. You have an ADO file for each layer you have modified in your system.
Per defaul it is locaed in C:\program files\Microsoft Dynamics
AX\40\Application\Standard . There will be at least a axSYS.aod and an
axSYP.aod . Where the axSYS.aod is the SYS layer and axSYP.aod the SYS-Patch