You cannot add some local built-in groups when you configure VPN client access in Internet Security and Acceleration Server 2004

When you configure virtual private network (VPN) client access in Microsoft Internet Security and Acceleration (ISA) Server 2004 to specify which local groups have remote access, you can add only the following groups:

• HelpServicesGroup
• IIS_WPG
• TelnetClients

You cannot add other local built-in groups, such as Administrators, Backup Operators, or Power Users.

This issue occurs because the other local groups are generic. The VPN server cannot distinguish between local administrators and domain administrators.

To give remote access to a local administrator, modify the Administrator dial-in properties. To do this, follow these steps:

1. On the ISA Server computer, click Start, point to Administrative Tools, and then click Computer Management.
2. In Computer Management, click System Tools, click Local Users and Groups, and then click Users.
3. In the Details pane, right-click Administrators, and then click Properties.
4. On the Dial-in tab, click Allow access under Remote Access Permission (Dial-in or VPN).

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.