how to setup 2nd server as backup global catalog server
Configure the Second Domain Controller as a Global Catalog Server. The first domain controller in the forest (AD01) is automatically configured as a global catalog server. For additional resilience, configure AD02 to be a global catalog server too.oining a new domain will require you to restart the server. 1  Configure the local network interface to use the IP Addresses of AD01 and AD02 as Preferred and Alternative DNS server. 2  Join the server to the fabrikam domain. 3  Log on to the domain as Administrator@Fabrikam.com.