NoteHKLM\SYSTEM\CurrentControlSet\Services\RemoteAccess\Accounting\Providers\{1AA7F840-C7F5-11D0-A376-00C04FC9DA04}\Servers\
The <Server-name> subkey stores server-specific configuration data for a RADIUS accounting provider.
The <Server-name> subkey is a variable representing the subkeys in the RemoteAccess\Accounting\{1AA7F840-C7F5-11D0-A376-00C04FC9DA04}\Servers subkey. It doesn't actually appear in the registry. We use this variable subkey to display the entries and subkeys that are common to the subkeys in the Servers subkey.
The <Server-name> subkeys in your registry represent RADIUS servers used for RADIUS accounting. Each subkey represents a particular server and stores configuration data that applies only to that server.
Note
RRAS add a <Server-name> subkey to the registry when you add a server to the list in the RADIUS Accounting dialog box in Routing and Remote Access.
Tip
To configure a RRAS server to use RADIUS accounting, use Accounting Provider box on the Security tab in the Routing and Remote Access snap in.