Install kopano-presence by entering the following commands in the terminal:
sudo apt update sudo apt install kopano-presence
Description:
Complete and feature rich groupware solution - presence daemon
A daemon for collecting and exporting user presence information across multiple protocols in a unified way. Supports XMPP and Spreed. Clients can both query the daemon with presence information (for example, the user is 'available' for XMPP and 'away' for Spreed) and update presence information (for example, make a user 'available' on Spreed). Queries and updates are performed with simple GET and PUT requests, respectively, using a simple (and identical) JSON format.
Homepage: https://download.kopano.io/community/
Version: 8.5.5-0ubuntu1
Section: universe/mail