A. No. Like Small Business Server (SBS), the Essential Business Server domain must be the AD forest root domain, and it can't have any child domains. Furthermore, there can be no trusts with other forests.
* Deploying, Managing, and Maintaining Windows * Key Features of Active Directory from Windows 2000 to Windows Server 2012 * Key elements of System Center 2012 and System Center 2012 R2 * Deploying, Migrating to and Managing Hyper-V in Your Organization * Implementing a Private Cloud * Using PowerShell to Automate Common Tasks