Thanks to Tim Hildred, I found out about the need to have a directory server. Before I embark on this path, I thought I could ping the community to get a since for what is common, easy, and/or available to best suit our wants.
First, what's the easiest one to setup and use? Something with a simple GUI would be desirable: a webmin module perhaps?
Most ideal would be something that is in line with our desire to move towards single sign on, ultimately authenticating against Google Apps. Does Google provide something supported? Is there something that can proxy google apps auth to an oVirt supported protocol?
Alternately, we have an LDAP server, but it does NOT store passwords, and as such, does not provide authentication for anything. Will oVirt store passwords for users created from such an LDAP service, or does LDAP need to be the authority as well?
Finally, we also have NIS setup (thought we hope to get away from that soon), so some means of authenticating through the systems local PAM system would be the next most convenient.
These are just thoughts and I am completely open to suggestions. Thanks in advance for any input! =)