I thought about this the other day! But I thought it worked or we had something like this set up. Do you have screenshots of what it looks like currently?
In a DM, if a user isn’t already part of the DM, the poster does get a popup notification that the user won’t be notified unless they are invited. We mention other users in DMs all the time, but don’t necessarily want to invite them to the DM.
The way I see it is that Chat could be set up differently - to automatically notify & invite a mentioned user to the Chat. But wouldn’t that be counter-intuitive if someone simply mentions them during a discussion and the person is then granted access to the chat? A catch-22? Or would it be simpler just to use @ username if an invite is not warranted?
Additionally, when I add to a personal chat someone who doesn’t belong to the group, there is no warning. The recipient will be added, but won’t be notified (obviously), but neither will I that he doesn’t have access to the chat.
Here I added Arkshine to the chat, but he doesn’t know. And if I didn’t know that he Didn’t request access to the closed chat group, I wouldn’t know that he doesn’t know unless I @ him (since there is now a warning).
edit: oops, I think that is was @JimPas was saying. My English being what it is, I can’t always grasp what some say…
I am having the same issue. Direct Message is good, because it says they won’t receive the message because they are not on the channel. However, if we lock down chat for a specific group, all users are available to choose from to Chat with. They’ll never receive the notification and the sender will never know they didn’t get it.