These often overlooked properties are key to how Microsoft will determine the number and nature of required AX licenses during a license audit.
You need to map menu items to correct CAL type by specifying a value for ViewUserLicense and MaintainUserLicense. If nothing is provided for these properties of a menu item, the menu item will be categorized with the highest available CAL type, which is Enterprise CAL ($$$).
To determine the appropriate CAL's, you can refer to "Microsoft Dynamics AX 2012 R3 Licensing Guide" and follow the guidelines in that document.
In the "Inside Dynamics AX 2012 R3" book, you can find text instructing you to not fill these properties. That is wrong. Microsoft has confirmed with us (EG) that this is wrong, and the team behind the book is aware of the error.