Actually, with a ton of playing around and a few phone calls I figured it out... This MiCollab server was completely configured and deployed with users, in a 3 MCD cluster supporting about 600 users using SDS & SPP between MiCollab and the rest of the cluster.
You have to match first and last name, plus login ID (which means a lot of editing by hand in MiCollab user database)... then in the AD detained list set the Role to Standard and save. The AD credentials are imported into the user, leaving all the other services intact, but most of the info in the User tab becomes grayed out and controlled by AD (name, login ID, password, department, location, etc).
What was killing me was the Primary Phone entry, if it existed it would just error out, so I remapped it in the AD configuration from Primary Phone to DID Number and was able to finally make a breakthough. The customer had the 10 digit mapped in the telephoneNumber field anyway, so it worked out.
So far I have gotten through about 50 users, another 550 or so to go. :/