As part of designing Lync Server 2013 infrastructure, one frequently comes across the common question from the customer "Can I have two global address list for user?" The reason cited is I have corporate and business function office I don’t want user from the corporate office be able to search for users from the business function and visa-versa.
The answer is YES you can partition your global address list into 2 or more partitions. In today’s blog we are going to understand how to best partition your global address list, the advantage, disadvantages and limitations. What are the best practices and how to get it done?
Read more at source: http://blogs.technet.com/b/11/archive/2014/10/06/lync-server-2013-guidance-series-can-i-partition-global-address-list.aspx