There are places that are sort of in the Deep Umbra but technically count as being in the Near Umbra of another planet. Let’s settle on Solar System for now.
Akashic Brotherhood has Chantry called Red Wine Forest Home on Miranda, a moon of Uranus. pg. 153 Book of Worlds
Sons of Ether Revised pg. 43 states the moons of Jupiter were rich with Tass before the Avatar Storm.