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.
Note: You can cross-post from Teams on desktop or web.
Cross-post a new channel conversation
Under the Posts tab, select Start a new post.
Select Settings > (Post in) Multiple channels.
Select + to add more channels to post to.
Choose the channels you want to cross-post to, or use search to find a channel. You can post wherever you're a member. Select Update to save.
Type your message and select Post. This sends your message to all the channels listed above the subject field.
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 + to find channels to add. To remove a channel, just select the X next to its name.
Finally, for any post you create, you can make it a cross-post by selecting More actions , choosing Edit > Settings > (Post in) Multiple channels, and finally picking the channels you want to add by selecting +.
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.