Mio syncs the messages sent between Slack, Cisco Webex Teams, and Microsoft Teams.
At this time, however, we do not support presence.
You will only be able to see a user on Skype as being "active" if they're using Skype. Similarly, the Microsoft Teams users will only be able to see the presence of other Teams users, and the same applies to Cisco Webex users.
Stay tuned as we continue to update the features on Mio to create a more streamlined environment for federated messaging.