Create a new chat
Select to the right of Search box.
Enter the names of the team members you want to chat with. You can add up to nine people in a group chat.
Share files on a chat
Select in the Type a new message box.
Select a file. You can add files from your computer or from your OneDrive for Business account.
See your chat thread or shared chat files
Select Chat, then select a person, persons, or bot under Favorites or Recent.
Select Conversation to see your chat conversation thread. Select Files to see files shared during the chat.
Turn a conversation into a call
Select or to turn the chat into an audio call or video call.