User Authentication

[whizzz]

Hi,
I am testing mutiple secondary server setup. As per the USD Advanced documentation ,
i entered the User authentication host entry is one of the secondary server name.
For ex : xyz
& my client can connect thro' that user authentication.
But if i want to add one more Host entry ex : abc
I'm not able to add two entries simultaneously. Entry xyz is override by entry abc.

Plz tell how to add multiple hosts for User Authentication.

Thank You.

Warm Regards,
Namrata.