Before authentication, the client application sends a user name and password to the remote access server. The server uses this data to authenticate a user. It can use the RASDIALPARAMS structure specified in the RasDial call to specify a user name and password.
If the server cannot authenticate with the specified data, it can enable the connection operation to enter a paused state so that the client application can query the user for correct authentication data.
The RASDIALPARAMS structure can also specify the network domain name on which authentication occurs.