Thanks again Jay and I really appreciate the confirmation on solution. Be sure to post again if you note any repeat instances or inconsistencies in your provisioning reports related to the impacted users. Glad all is working but seems strange Office 365 would update attributes determined to be accurate in AD as this would be unexpected. If needed, we can work offline to exchange any private info and post the results here in case others encounter a similar issue...just send me a PM.
I'll keep my eyes peeled for updates on this topic.
-Tony