2000 Server Licensing Requirements
Microsoft offers flexible, cost-effective options for
licensing Windows® 2000 Server family products.
You need a server license for each server within a
Windows 2000 Server-based network and a Windows 2000 Server Client
Access License (CAL) for each client computer that is used by an
authenticated user or that uses Windows 2000 Server Services.
The majority of customer scenarios will require the
same number of Windows 2000 CALs as they would with Windows NT® Server
Authenticated Use Explained
An authenticated user is one who directly or
indirectly uses the Windows 2000 Server Integrated Sign-on Service or
receives credentials from the Windows 2000 Active Directory™ service.
Windows 2000 Server customers who may be affected by
changes in license terms include users planning to access applications
running on Windows 2000 Server and users connecting to Windows 2000 as
a Web server:
- Authenticated use by applications.
Customers whose applications use Windows 2000 authentication or
directory credentials will require CALs. Many such customers have
already purchased CALs for other services such as file and print. But
for those who do not have CALs for other purposes, CALs will be a new
- Authenticated Internet access.
Customers with Internet sites using Windows 2000 authentication will
require CALs for authenticated users connecting to their sites. Such
customers may comply with this licensing requirement by purchasing
CALs in “Per seat” or “Per Server” mode. Or, they may opt to
purchase the new Internet Connector license for unlimited Internet
CALs on a single server. Access to Internet sites by anonymous users
does not require a CAL.
For authenticated Internet users, you may substitute
the Internet Connector for CALs.
Server Services Requiring CALs
Client computers accessing the following server
services in a Microsoft Windows 2000 Server-based network require
Windows 2000 Server CALs:
- File services. Accessing or managing files
or disk storage.
- Printing services. Printing to a printer
managed by the product.
- Remote Access Service. Accessing the server
from a remote location through a communications link, including a
virtual private network.
- Terminal services. Using the terminal
services feature of the server to enable client devices to use
applications or data residing on the server
Client Access Licenses: Per Seat vs. Per Server
The license model for Windows 2000 Server offers two
distinct licensing modes for Client Access Licenses (CALs): Per Seat or
Per Seat Licensing
- Users acquire a CAL for each workstation or other
device that connects to any licensed server. This includes users
running Windows for Workgroups, Windows 95, Windows 98, Windows NT
4.0 Workstation, and Windows 2000 Professional. Note that a Windows
2000 Server CAL is required whether you use client software supplied
by Microsoft or software from a third-party vendor.
- Windows 2000 Server CAL is associated with a
specific computer or client device (seat). Client computers are
allowed access to any server within a Windows 2000 Server-based
network, as long as each client machine is licensed with the
appropriate Windows 2000 Server CAL.
A per-seat license is most economical in distributed computing
environments where multiple servers within an organization provide
services to clients, such as a company that uses Windows 2000 Server
for file and print services.
Per Server Licensing
- Users have a set number of devices connected to a
licensed server at a given time and customers need a sufficient
number of CALs for that server to cover all the concurrent users of
- A Windows 2000 Server CAL is associated with a
particular server. This alternative allows concurrent-use licensing:
If customers decide to use the server in Per Server mode, they must
have enough Windows 2000 Server CALs dedicated to that server to
accommodate the maximum number of clients that will connect to that
server at any one point in time. The server assigns Windows 2000
Server CALs temporarily to client computers; there is no permanent
Windows 2000 Server CAL associated with a specific client machine. If
a network environment has multiple servers, then each server in Per
Server mode must have at least as many Windows 2000 Server CALs
dedicated to it as the maximum number of clients that will connect to
it at any one point in time. Under this option, the customer
designates the number of Windows 2000 Server CALs that apply to the
server during setup.
A Per-Server license is most economical in single-server, occasional,
or specialty-use server solutions. Some examples include Remote Access
Service solutions, CD-ROM servers, or the initial server of a planned
Customers may select the alternative that best suits
their organization, and purchase the relevant number of CALs. Note: It
is not necessary to notify Microsoft of the licensing option selected.
For either option, a server license is also required
for the right to run Windows 2000 Server server software on a
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