Originally Posted by
xenophile
This booking was made with miles. When I go to "Manage my booking" the "Upgrade with miles" option is greyed out and not selectable. I suppose this means I can't do anything?
If you have a ticket issued with KF miles, then you cannot "upgrade" the flight - but you can "reissue" the ticket into Business, if there is Saver (or indeed Standard) availability for the flight you want.
You will pay a difference in the number of miles (and taxes, if any).