Is there any way to add a bot (created with Azure) to an existing Skype group chat? I can create new groups with the bot but not add it to a group? I didn't submit to bot for application yet, is this really absolutely necessary?
If you use the Add bots button in the group profile you will only be able to look up published bots:
However, if you use the Add to Group button in the upper right corner (not available in the mobile client), you can find your bots that are still in preview: