All ka-band communications.
ELINT.
Read more at http://spaceflight101.com/long-march-4b-launches-hxmt-space-telescope/#AdEp4bOgoXGMgbtu.99
Second in constellation.
"Provide C-band and Ku-band communications services over Africa, Asia, Europe and the Middle East. Intelsat 22 also carries a hosted UHF payload for the Australian Defence Force."
Four primary satellites and one orbiting spare will comprise the MUOS system as it is fielded over the next few years to augment and then replace the Navy's aging Ultra High Frequency spacecraft constellation. Orbital parameters estimated.