Enable Broadcast Group in communities
|Knowledge Article Number||000239983|
|Description||You created a group in community. You don't see the "Broadcast Only" option.|
|Resolution|| 1) Go to setup -> Customize -> Chatter -> Groups -> Group Layouts
2) Insert "Broadcast Only" on the Group Layout.
3) Go to your Community Group and click "Edit Group".
Note: You won't see this option on creation. You will need to Edit your group after created.