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  Terminal Server CAL Changes in Windows Server 2003 (Chart)    
   

This table outlines the various scenarios for accessing Windows .NET Terminal Server with Terminal Server Client Access Licenses (TS CALs) and how these scenarios have changed from Windows 2000 Terminal Server. Note that under Windows .NET Terminal Server, TS CALs can be applied to either users or devices.

Scenario Client Type Windows 2000 Terminal Server Windows .NET Terminal Server
Employees accessing applications via terminal services Windows XP Professional without upgrade rights, purchased before Windows Server 2003 ships No TS CAL purchase required. TS CAL must be obtained (at no charge) from Microsoft for each device or user.
Windows XP Professional without upgrade rights, purchased after Windows Server 2003 ships TS CAL must be purchased for each device or each user.
Windows desktop covered by an Enterprise Agreement, Software Assurance, or Upgrade Advantage before Windows Server 2003 ships TS CAL must be obtained (at no charge) from Microsoft for device or user.
Windows desktop covered by an Enterprise Agreement, Software Assurance, or Upgrade Advantage after Windows Server 2003 ships TS CAL must be purchased.
Windows NT, 9.x TS CAL must be purchased for each device. TS CAL must be purchased for each device or each user.
Anonymous Internet users accessing applications over the Internet via terminal services Any client Server must have Terminal Server Internet Connector. Limited to maximum of 200 anonymous connections (authentication not permitted). Server must have Terminal Server External Connector. Unlimited number of authenticated connections.
Authenticated business partners accessing applications over the Internet via terminal services Any client Scenario not supported. No CAL available. Server must have Terminal Server External Connector. Unlimited number of connections.

Or, TS CAL can be purchased for each external device or user.