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.
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@Wendy_S There are two permissions introduced in PM v3
Use Multi-user Message feature
Use Broadcast Message feature
Permission #2, is the capability that existed in PMv2. You will be able to select multiple users and send a private message. Each recipient will receive an individual private message from the sender.
Permission #1, as you said is a multi-user (group) message, introduced new in PM v3. In a multi-user private message, it is always a reply-all as all the recipients and sender will be present in the thread till the end. In your case, it looks to me that you would want to give broadcast permission instead of multi-user permission.
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