In Windows Server 2016, IPAM will support multiple AD forest deployments. You will now be able to manage DNS and DHCP servers spanning across different Active Directory forests through a single instance of IPAM, provided they have 2-way trust relationship with the AD forest the IPAM server belongs to. IPAM provides the same set of management features for these servers irrespective of the AD forest they belong to. This will enable admins to view and manage their DDI (DNS, DHCP, IP address) infrastructure across the AD forests through a single console.

http://blogs.technet.com/b/teamdhcp/archive/2015/08/25/multiple-active-directory-forest-support-in-ipam.aspx

• Edited by Kumar Ashutosh ShrivastavaMicrosoft employee, Owner 9 hours 52 minutes ago