I have three huskies, my one female husky, Keva, rarely goes potty on walks. She will hold it until we get home. She's really hard to get to go potty on trips and stuff too she doesn't like to do her business anywhere but in the backyard. Do you have a fenced backyard or is she just out on a leash/tie-out when outside? It's possible she doesn't feel comfortable going when she's on a leash. I'd check for the UTI too Keva has had a UTI a couple of times and she peed in the house when she had them...only by the back door but she was peeing so frequently I didn't always get to let her out in time. This is a silly question I'm sure, but when you take her on walks do you take her to the grass? Most dogs won't go on concrete/rocks/etc. at least mine won't unless they really have to go.

Also I don't see that crate training would necessarily be a bad thing. My dogs do great in their crates, they see it as their own "rooms" kind of...their dens. Unless the dog really freaks out being a crate I don't see how it would make the problem worse. The dog needs to be confined somehow when they aren't home, and she needs constant supervision when they are home. Definitely do not rub her nose in it, that will not teach the dog not to pee in the house it will teach her when she pees she gets punished and then she's more likely to go hide from you in different rooms to pee. She needs to learn that going potty is fine, she just needs to go outside. Keep her on a leash with you at all times in the house don't let her wander around, if she sniffs, take her outside immediately. Confine her somehow when you aren't there to watch her. If you catch her in the act immediately take her outside.

Huskies LOVE food they are very motivated by it so make sure you have lots of yummy treats handy to give her when she does go potty outside. They are also extremely intelligent, I didn't find mine terribly hard to train, all I had to do was involve food. Using a clicker worked well for them to you might look into clicker training as well. Best of luck to you hope it works out give her another chance huskies can be wonderful dogs.