I'm looking to use United miles for either Lufthansa or Austrian Airlines Award flights. I'm trying to set up Award Alerts on Expert Flyer, but my UA searches are only showing UA flights (that is, it's not showing me the LH or OS flights) .

I know I can set up an award alert separately on OS or LH searches, but if something pops up, will I be able to use UA miles for those? Or only their own Miles and More currency?