I have a client with eight users and a single Windows 2012 Foundation server which is not acting as a DC. There's no current domain. The server is used as a fax-server, and the third-party software installed on it requires that it not be a DC. The client is interested in adding a Windows 2012 Standard server to the environment to act as a DC among other things. My question is, can the Foundation server be a member server in the new domain or will I need to upgrade it to Standard when I introduce the DC? I can't find a clear answer on this. Thanks in advance.