necessary info to design a solution in a merger scenario paper

As IT Administrator, I have been tasked with designing the technical strategy for the merger of your company with another company. develop a list of questions that you will need answered to effectively design a solution for allowing seamless of information resources between the two companies. Your company has a single, Windows Server 2008 Functional-Level AD DS Forest. The new company has a directory service but that is all the information I have been given thus far.

Respond in detail. Consider trust relationships, compatibility with other directory services (previous versions of Windows, other operating systems, for instance) in your reponse.