Use RADIUS for accounting

To use RADIUS for accounting

In the console tree of ISA Server Management, click Virtual Private Networks (VPN).
On the Tasks tab, click Specify RADIUS Configuration.
On the RADIUS tab, select Use RADIUS for accounting (logging).

Notes

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 Virtual Private Networks (VPN).
For ISA Server 2006 Standard Edition, expand Microsoft Internet Security and Acceleration Server 2006, expand Server_Name, and then click Virtual Private Networks (VPN).