External notification

OK, bear with me here...
If I set the CBActivity > Parameters > Notifications > Email on. and I set CBActivity > Parameters > Notifications > Notify > Activity > Create to Disabled, then no email is sent.
But if I turn it onto to Enabled then it sends to everyone. My choice there is "All Users" "Connections" "Followers" "Moderators" - but I'd like the emails to be sent to the GJ Group members only.

It's a very tricky balance between sending them to the website and them not wanting to go through 3 or 4 clicks to log in each time they get a notification... we're competing here for ease of use and attention span in a super-distracted world.

If I set the CBActivity > Parameters > Notifications > Email on. and I set CBActivity > Parameters > Notifications > Notify > Activity > Create to Disabled, then no email is sent.

That's as expected. You turned off the notification. The email parameter sends an email FOR the notification. It does not replace the notification behavior.

But if I turn it onto to Enabled then it sends to everyone. My choice there is "All Users" "Connections" "Followers" "Moderators" - but I'd like the emails to be sent to the GJ Group members only.

That's because you turned on a generic notification. That notification has nothing to do with CB GroupJive. That notification is for any post on any activity stream.

As explained earlier if you just want a notification for GJ activity posts you just use the "Create of new activity post" notification within your groups. That's the purpose of that notification. Nobody is going to receive a GJ post notification if they don't toggle that notification on.

So you should turn off CB Activity > Parameters > Notifications > Notify > Activity > Create. Then your users can toggle on the "Create of new activity post" within their groups. You don't need to do anything beyond that. GJ will send an email (this is confirmed working) for the new post on the activity stream.

This can be taken further by letting CB Activity override the GJ notification behavior. To do that navigate to CB Activity > Parameters > Notifications > Notify > CB GroupJive and set Notifications to Replace. Next navigate to CB Activity > Parameters > Notifications > Email and turn on emails. Now GJ notifications will be logged into CB Activity and send an email for each of them. Whether you do that or not is entirely up to you. It's just another option available to you.

I don't really know what more to say. GJ notifications are entirely handled in GJ now. There isn't this weird disconnect where CB Activity handles some and GJ handles some. Latest CB Gallery and CB Activity releases moved those notifications properly into GJ.

The trouble with that way is that it's now off for each user by default, and I don't see a way to switch them on by default. CB GroupJive > Parameters > Notifications > Defaults does not include that option.
If I say "Hey everyone you've got to switch this setting on" they're going to be confused wondering why it was "switched off" (even though it wasn't), and most of them won't switch it on.
So I can't do that without at least the ability to switch it on by default one time.

CB GroupJive > Parameters > Notifications > Defaults does not include that option.

The defaults for those 2 new notifications are in CB GroupJive > Parameters > Integrations > CB Gallery and CB GroupJive > Parameters > Integrations > CB Activity.

If I say "Hey everyone you've got to switch this setting on" they're going to be confused wondering why it was "switched off" (even though it wasn't), and most of them won't switch it on.

I know and I'm sorry for that, but this functionality just didn't exist yet. What was previously being done in CB Activity was effectively a bandaid fix.

So I can't do that without at least the ability to switch it on by default one time.

You can with the above parameters. It however won't have any impact on existing users. As for where this is stored the notification defaults are stored in the params column of the _groupjive_notifications table. That column supports JSON or INI structure so you should be able to query it and insert the activity_new and gallery_new notifications with a value of 1 to force them on.

OK, or I could just edit the database?

To change the notifications for existing users? Yes if you want to. They'll be stored in _groupjive_notification.