In the console tree of ISA Server Management, click
In the details pane, click the applicable Web publishing
On the Tasks tab, click Edit Selected Rule.
On the Authentication Delegation tab, select the
appropriate delegation method.
To open ISA Server Management, click Start, point to
All Programs, point to Microsoft ISA Server, and then
click ISA Server Management.
For ISA Server 2006 Enterprise Edition, expand
Microsoft Internet Security and Acceleration
Server 2006, expand Arrays, expand
Array_Name, and then click Firewall
For ISA Server 2006 Standard Edition, expand Microsoft
Internet Security and Acceleration Server 2006, expand
Server_Name, and then click Firewall
If you do not limit access to authenticated users (for example,
when a rule allowing access is applied to All Users), and
the published server does not require authentication,
unauthenticated requests will be forwarded to the published server
even when a delegation method has been selected.