I’m totally open to solutions third party plugins outside of Forum Engine but I would love if there was a way using the engine.
Thanks for trusting and doing business with us.
Currently, ForumEngine has not supported the feature that the user can chat to another. However, they can send a message to another via [Contact me] button (http://i.imgur.com/6sTruu5.png)
If you have any other questions, we’d be happy to answer them!