With Agile becoming more and more popular, many customers have adopted it as it allows you to react quickly to changing business needs. In my experience, I have seen Agile ERP projects being more successful than the waterfall method. Every customer has his/her own version of Agile though. Understand the customer's current process, and tweak it to the version that would work for the ERP project. For example, if they are creating all the tasks on the board and physically writing them down, you may want to switch to the electronic format for better collaboration with remote teams.
The following are some recommendations if you plan on implementing Dynamics AX via an Agile methodology: