Originally Posted by
_kurt
It can take a few days; occasionally even a week. This is very annoying if you get upgraded on several flights in a short time period as you can't trust the balance on the website. The balance in the mobile app seems to get updated more reliably.
Not using 500-mile upgrades. You can at least get them an MCE seat assignment if they are in the same cabin as you, but you have to call.
Well that's better than nothing. Good to know. THanks.