Group chats on Windows Phones

Hi Community,

I’m looking for a good “It can do everything but it costs nothing” corporate communication tool.

It seems Openfire is exactly what I’m looking for.

Just one thing I can’t figure out.

We are using Windows Phones in our Company. There seem to be just a few XMPP apps in the Windows store.

So here is my question. Did anyone of you use openfire and XMPP Clients on Windows Phones that can participate in Group Chats ?