Microsoft Dynamics CRM 4.0 is a fully integrated customer relationship management (CRM) system. Microsoft Dynamics CRM gives you the capability to easily create and maintain a clear view of customers from first contact through purchase and post-sales.

Enterprise Edition:
- Offers a rich feature set, and supports multi-tenant deployments.
- No licensing limit on number of users.
- Runs on Windows 2000 Server; Windows Server 2003;
Windows Small Business Server 2003.

Professional Edition:
- Offers a rich feature set, and supports single tenant deployment.
- No licensing limit on number of users.
- Runs on Windows 2000 Server; Windows Server 2003;
Windows Small Business Server 2003.

Workgroup Edition:
- Offers the same rich feature set as
Microsoft Dynamics CRM 4.0 Professional Server.
- Includes and supports a maximum of five user licenses.
- Runs on Windows Server 2003; Windows Small Business Server 2003.