Hi,
MS Dynamics AX is ERP and MS CRM is CRM process both are different products. AX is a ERP product where we can handle entire company process like finance, warehouse, Trade and logistics, production, project accounting, master planning, CRM, HRMS modules.
MS CRM is contians sales, marketing and service module. MS CRM is a webapplication, it is a business solution.
Thanks & Regards, MS CRM Consultant, V.Surya.