For redundancy, you want to add a secondary RADIUS server.

Add to the application settings of the PVWA web.config file.

In the PVWA vault.ini file, list each RADIUS server host address in the "Addresses" attribute separated by commas.

Open the DBParm.ini on the Vault server. Add the second RADIUS server configuration settings after the first one, separated by a comma. Most Voted

In the PVWA web.config file, add the location element at the end of the config file. Set the path value to "Default Web Site/PasswordVault/api/auth/pkipn/logon".