V-Flyer

We are flying MAN MCO in September and when I logged into my booking a few days ago it gave me 2 options to upgrade one i can upgrade flat out by selecting seats in one of the Premium Economy cabins the other it gives me and option to bid to upgrade.

If I do the option to bid to upgrade how long does it take for them to tell me if it worked?

I have done a bid on my next flight.
I will be notified 2 days before the flight.
Dick D