Understanding Lync load balance

DNSLoadBalancing

http://technet.microsoft.com/en-us/library/gg398634.aspx

DNSRequirementsforAutomaticClientSign-In

http://technet.microsoft.com/en-us/library/gg425884.aspx

ConfigureDNSforLoadBalancing

http://technet.microsoft.com/en-us/library/gg398251.aspx

DNSLoadBalancinginLyncServer2010

http://blogs.technet.com/b/nexthop/archive/2011/05/25/dns-load-balancing-in-lync-server-2010.aspx