I see a notification (pop up message) in the web interface when I receive a new SMS but this notification appears and disappears, so if you are not looking at the web interface I do not know if I received a new message. Was this notification you were referring to?
I was referring to a static notification that remained until we saw the existing SMS (at menu DMR SMS Chat in web interface), then it was removed and only reappeared when a new SMS was received. With this static notification when we entered the web interface we knew if we had new SMS messages.
When you mention "source ID you have set for OS2" what is the web interface menu where this parameter is defined?
My configuration at DMR SMS Chat (2683077 is my DMR ID and in my codeplug i have the same ID):
Thank you in advance for your support and attention.