Dear Daniel, I use MS botframework SDK to develop a skype bot, currently has a problem, skype bot operation is good, can be to a particular user (use similar user ID: 29: xxxxc5QKwJBWa7puhqRAA9mw - su - tiUJwKR6_AqYN3r4g) send image text alarm, current can be obtained the user name, but I want to retrieve the user avatar, additional this how to deal with, thank you.