Dynamics CRM External Connector with Software Assurance An External Connector grants access to the server by an unlimited number of external users such as business partners, suppliers, customers, retirees, and alumni. Basically, an external user is a person who is not an employee or similar personnel of the company, such as a business partner or customer. With this license you do not need to buy individual CALs. It is licensed per server. This Full Use Additive External Connector provides external users with write access to CRM only. This External Connector license includes Microsoft's maintenance program Software Assurance.