Based on the message before yours, it sounds like it's not added yet, which isn't surprising for something that apparently caught them by surprise.
Has anyone seen this have any actual detrimental effects yet, particularly after reboot? I haven't.
Event Viewer has a couple interesting error events (Application and Service Logs, Microsoft, Windows, Device Management subsection) which correspond with the timing of this:
-MDM Session: OMA-DM message failed to be sent. Result: (Conflict (409).).
-MDM Session: OMA-DM message failed to be sent. Result: (Not found (404).).