Question

How to send messages from one remote machine to another?

Answer 1

If you run into admin rights errors you will either need to contact the server admins or you will need to find a different way to talk to people in your office :P I recommend gmails messaging system for that. You can log into mail.google.com then click their email address on the bottom left and send them instant messages. As long as they have google up as well or set up email notifications to their phone they can communicate back with you.