To add contacts to a conversation:
- Sign in to Skype Preview.
- From the Recent tab, select the conversation you’d like to add new contacts to.
- Select the More button to either create a new group in a one-to-one chat or add people to an existing group chat.
- Select the contacts you would like to add to the conversation. When you have finished, select the Add button to start your group chat.
Important: If the chat window displays a message that a particular contact won’t be able to participate in the group chat until they upgrade Skype, please inform them by sending a separate 1-to-1 instant message to upgrade at Skype.com/updateme, or send them here for more information on cloud-based group chats.