In sales and marketing there is a transaction log capability that allows you to track details related to the sales and marketing module. Now there is also a couple of other tracking systems like the database log and in procurement you have the purchase order change. Each have their different capabilitites. If you want a basic ability to see who created a customer then you can use the sales and marketing transaction log. If you want to see the actually fields then you might want to turn on database log. But you don’t want to turn both on together for performance reasons as well you want to carefully consider how often the data is really needed.
Here is a quick look at how to turn it on for customers.
AX2012 R3 CU9