Counsellor: If you have a recent Mileage Plus statement, turn it over and look on the reverse.
I think the link you're looking for is:
http://members.aol.com/premex/upload...creditform.gif
Gaucho100K:
http://www.ual.com/site/primary/0,10017,1155,00.html
Mileage credit will not be awarded for flight cancellations, except that United may, at its discretion, give credit for flights cancelled due to mechanical reasons.