EFTD Confirmed Upgrade Applicability?
 

A while ago, I received a Confirmed F Upgrade EFTD because my return segment was booked in a Y fare on an ERJ. The outbound segment of that itinerary was in a (much) lower fare class.

If I redeem that against a future itinerary booked completely in H, will I be upgraded on all segments (assuming available inventory, of course), or just one?

Thanks . . .