Hi Patrick,
Interesting question. I have never built anything like this.
If I had to make something like this I think I would look in the direction of Pusher: https://docs.mendix.com/appstore/modules/pusher
In addition, Austin McNicholas wrote a very clear blog about the use of Socket.io in 2019. Perhaps this can also help you further: https://austinmcnicholas.com/blog/2019/7/23/socketio-mendix-implementation
Good luck!
Hi Patrick,
I can see two options:
See if this appstore module is of any use to you: https://appstore.home.mendix.com/link/app/45837/
OR
We have some similar setup with us. But we have two apps.
Interesting to see other's takes on this. I'd probably still go for the microflow timer in a layout, or alternatively send an email or text message to the logged in users. There are modules and plugins for that.