In order to start troubleshooting you need to classify what kind of non-delivered messages you have:
- Messages are marked as delivered to the server, but never marked as read
- Messages are marked as Non-delivered in the Desktop app
Messages are marked as delivered to server, but never marked as read
- Check if another person is Online (a person needs to come Online to read your messages from Server).
- Check if another person has the latest Desktop application or Mobile app with Chat functionality added.
Messages are marked as Non-delivered in the Desktop app
- Hit Resend option. If the message is still shown as non-delivered proceed with the next steps.
- Check internet connection on your computer.
- Check if your Presence status is Online or Busy or On Call (displayed on Avatar in the left-bottom corner of the app screen).
- Perform Logout and repeat Login to the application.
In case the problem is not solved please provide us with the application log file.