MP Accrual for LH operated, Upgraded Flight
While flying on an LH operated international flight on UA (016) ticket, I paid for an upgrade to business class at check-in.
MileagePlus Terms and Conditions don't clarify accrual rules for this situation other than "Mileage accrual for MileagePlus and other participating loyalty programs will be based on the original fare class purchased."
Should I expect to accrue miles for the upgraded C fare? LH receipt specifically states "upgrade from M to C".
UA has calculated miles based on the pre-upgrade class. Has anybody been in this situation before?