Lync Server 2013 Preview introduces new high availability and disaster recovery features which are scalable and cost-effective for your organization’s mission-critical business needs. The two primary new features are the pairing of pools in geographically-dispersed sites to provide disaster recovery, and support for mirroring to improve Back End Server high availability
Read more at source: http://blogs.technet.com/b/nexthop/archive/2012/08/29/new-high-availability-and-disaster-recovery-features-in-lync-server-2013-preview.aspx
Cheers,
Anderson Patricio
http://blogs.msexchange.org/patricio
http://www.andersonpatricio.ca
Twitter: @apatricio