I don't know much about OSD, but is it possible to force the migration to run as local Administrator or as SYSTEM, which are not subject to UAC?
That is true... And I expected profile migration to occur at the last phase of OSD. That would have used the system account. I had to reboot the machine manually - prior to me pushing my manual profile migration task, in order to get my UAC notification to allow SMA. I probably shouldn't have mentioned all of that. My manual tasks were just to get the job done. It's not how it should work.
My issue remains - Profile Migration to Win 7 does not occur during the OSD task.