"Apparently, when I send to a group chat and someone is on Skype using the iPhone client, my messages are said to be coming from "cid-(-somenumber)@outlook.com". This only happens with push notifications. So, don't know if this is something you are doing, or something on the iPhone end, or what. But if I actually sign in to web.skype.com and send the message to group chat from there, it gets tagged correctly."
"Apparently, when I send to a group chat and someone is on Skype using the iPhone client, my messages are said to be coming from "cid-(-somenumber)@outlook.com". This only happens with push notifications. So, don't know if this is something you are doing, or something on the iPhone end, or what. But if I actually sign in to web.skype.com and send the message to group chat from there, it gets tagged correctly."