The axle itself can't be "adjusted" in the sense of shims or bolts that can be moved to change alignment. If it is installed at an angle, you would have toe out on one side and toe in on the other side so you would have to un-bolt the whole axle and move it on the chassis frame to correct. If a single wheel has toe in or out, you probably have a bent arm and the axle would need to be replaced. If you are looking at a pretty small adjustment shops (mostly truck spring shops with big equipment) have been known to bend the axle tube in the middle to change camber or toe, but that's not really an adjustment, it's a bit more than that. You might have someone suggest heating and bending the suspension arm but that usually would melt the rubber torsion springs inside the tube and isn't recommended.
Brian
2005 F250 Supercab, Powerstroke, 5 speed automatic, 3.73 gears.
20 ft race car hauler, Lola T440 Formula Ford, NTM MK4 Sports Racer
1980 MCI MC-5C highway coach conversion
2004 Travelhawk 8' Truck Camper