HP 800 User Manual page 328

802.1X Quarantine Method
Setting up the 802.1X Components
11-28
15. Verify that you are using Microsoft's version of the challenge-handshake
authentication protocol (CHAP) MSCHAPv2. If for some reason, you
cannot upgrade to MSCHAPv2 at this time, perform the following
workaround for MSCHAPv1:
a. Configure passwords:
i. From the Windows Server 2003 machine, select
Start>>Settings>>Control Panel>>Administrative Tools>>Active
Directory Users and Computers.
Figure 11-27. Active Directory, Properties
ii. Right-click on your directory name and select Properties.
iii. Select the Group Policy tab.
iv. Click Open.