Do you have information or an announcement that needs to be shared across multiple teams and channels? You can post that message to multiple channels at once.
Cross-post a new channel conversation
In the channel, select Format under the box where you type your message.
At the top of the box that opens, choose a message type: New conversation or Announcement.
Select Post in multiple channels > Select channels.
Choose the channels to post in or use search to find a channel. You can post wherever you're a member.
Select Update. The To field updates and shows the channels to post in.
Type your message and select Send. This posts your message to the selected channels.
Edit a cross-post
You can edit your original message in a cross-post anytime by selecting More actions in the post, and then choosing Edit .
From here, you can also add channels to post in, or you can remove channels from the list. Select Post in multiple channels >Select channels to find a channel to add. To remove a channel, just delete it from the To field.
Finally, for any post you create, you can make it a cross-post by clicking More actions , then choosing Edit > Post in multiple channels > Select channels, and then selecting the channels you want to add.
Note: Team owners can establish moderation rules to control who can post, react, and reply to messages in a channel. For more details. see Change moderator roles and settings in a channel.