When a user is logging into the Office 365 OneDrive App the only thing that is showing are files of long hexadecimal numbers? This does not occur for every user, only some users are affected.
I have been unable to find a valid support number for Xerox Workplace Cloud Support.
This would be an issue in the App itself and not related to Workplace Cloud. There is a Forum site for the Gallery. Please try posting your issue there.
This forum site is for Xerox Workplace Cloud. This solution does not integrate with OneDrive. I am guessing you are using the Connect for OneDrive gallery App on your Xerox device? If yes, please use the Gallery App forum for your question.