How to provide multiple LDAP servers for Sametime authentication?

Hi, We use Active Directory for Sametime authentication. We need to provide redundancy so that when one Domain Controller goes down then user authentication requests automatically get forwarded to the next Domain Controller defined in the DA.NSF

Besides adding a LDAP server document in the DA.NSF what other steps we need to take to make it to work?

Request you all to please treat this as urgent.

I may be contacted at the following email address:-

akashdeep.singh@wipro.com

Thanks in advance.

Akashdeep Singh