Problem description: Limited Main menu after activating Retail configuration key

After activating a Retail configuration key, restarting Dynamics AX client only shows one menu item in the Main menu: Retail Essentials.

Also some buttons aren’t available anymore on Sales orders and Purchase orders, such as Request change, Purchase order confirmations, …

Solution: activate configuration key Full feature set

Apparently activating Retail limits (to ease user experience) the Dynamics AX client. In case you want to use some Retail features, but you are not in a Retail implementation, checking the Full feature set configuration key brings back all the features of Dynamics AX in the Main menu.