I would like to implement IRM-Rights Management (Client) from my client to my Windows 2008 Server. It is not the Windows Server 2008 R2 version, just the plain vanilla wrappered version, Server 2008.

I would also like to implement RMS-Rights Management Services on the Windows Server 2008, but I have a question about that:

Question:
Must I create a server domain, and then implement Active Directory Services, in order to utilize the Rights Management Services? Or can I install RMS without a domain (WOrkgroup only) and no Active Directory Services?