Lync Server utilizes DNS for several purposes. Not only do traditional hostname-to-IP address lookups occur, Lync Server utilizes specialized DNS records to identify particular services much like Active Directory does. Lync Server is even able to use DNS round robin to provide load balancing between sites. Some record examples include
• A or address records
• PTR or pointer records
• SRV or service location records
Lync Server requires registration of hostnames of servers as A records. Administrators implementing the DNS load-balancing features of Lync Server are required to specify the server FQDN and the cluster FQDN using the same IP address for each server in the cluster and A records for all clusters that contain ...