Question : Backup Domain Controller at Remote Site

Hi all,
I just install the Windows Server 2008 Backup Domain Controller at remote site. We have only one domain and have multiple sites. At remote sites, computers are configured to use DHCP.  If the domain controller at main site is down so we will have connection provided from backup domain controller at remote site. So employees still can access to intranet and resources.

Do I need to configure the DHCP on Backup Domain Controller at remote site?
Thanks

Answer : Backup Domain Controller at Remote Site

You must make sure that the clients at the remote sites point to their local DNS servers if not the clients will not authenticate to their local DC. Clients instead will look to the main DNS server then authenticate to that DC.

Also, you need to setup Sites within AD Sites and Services.