Microsoft Dynamics CRM 2011 Client Access License Overview

**User CAL **- With a user CAL, each licensed user may access the Server from any device.

Device CAL - With a device CAL, the CAL is assigned to a device and may be shared by non-concurrent users over time, such as in a shift worker or call center scenario.

Employee Self Service CAL – The Employee Self Service (ESS) CAL provides a user with limited API access and limited read-write access to “Microsoft Dynamics CRM functionality” through any application/graphical user interface (GUI), other than the Microsoft Dynamics CRM client.

**Limited CAL **- The Limited CAL provides a user with full read-only access (e.g., for reports) and limited write access to “Microsoft Dynamics CRM functionality”. Users may view or query CRM data. 

**CAL **– The CAL provides a user with full read-write access to all capabilities within Microsoft Dynamics CRM 2011 and consists of Employee Self Service CAL, the Limited Use Additive CAL, and the Full Use additive CAL, combined to provide full “Microsoft Dynamics CRM functionality”.

Limited Use Additive CAL – The Limited Use Additive CAL provides a user with full read-access and limited write-access functionality using any client, and may only be purchased to supplement an ESS CAL, for Users who may later require full read and limited write access.

**Full Use Additive CAL **– The Full Use Additive CAL provides a user with full write-access functionality, and may only be purchased to supplement a Limited CAL, for Users who may later require full read and write access.

Taken from:

Microsoft Dynamics CRM 2011 Licensing & Pricing Guide 

Taken from forum discussion: http://social.microsoft.com/Forums/en-US/crm/thread/be4bb4c6-b17f-4272-83ce-434e3fc8e700