Thanks @RayC .  As Ray mentioned,  on Private Messages v3, while sending a group private message,  you will be able to select a discussion style under the Group Hub and send a private message to all members of the Group Hub. Similarly, you can send a private message to users based on a specific rank or a role. Both Broadcast and Multi-user private message can be sent. Currently the limit on broadcast is 1k and maximum limit for a multi-user message is 50. We are currently working on increasing the limit for broadcast message.  Thanks @alexandraG for the feedback on @mentions.  As Ray mentioned, we do not have a capability to @mention all users with a specific rank at once.  ... View more