Did you know you can send a custom toast notification to a remote computer? Call it poor man’s IM, but if you’re using Windows 10 with PowerShell remoting enabled it might be a good way to annoy your colleagues if you can’t find a more constructive use!
Try the following code, which creates a notification like this on your mate’s computer:
Is there a way to send it urgently, so it skips the Focus-Assistant?