How to install Internet Authentication Service on W2K3

This is step-by-step instruction on how to install Internet Authentication Service (IAS) on W2K3.

To Install IAS

1. Open Add or Remore Program in Control Panel.
2. Click Add/Remove Windows Components.
3. In the Windows Components Wizard dialog box, click Networking Services, and then click Details.
4. In the Networking Services dialog box, select Internet Authentication Service, click OK, and then click Next.
5. If prompted, insert your Windows Server 2003 CD.
6. After IAS is installed, click Finish, and then click Close.

Original link from Microsoft TechNet site.