You can adjust who's allowed to post to channels or use mentions that notify all channel members. This helps keep large channels, like those used for announcements, on topic and free from distraction.
You can change who can post messages in the #general channel. This channel will be read-only for anyone without permission to post.
From your desktop, open the #general channel.
Click the channel name in the conversation header.
Select the Settings tab.
Next to Posting permissions, click Edit.
Select who can post and reply to messages. If you're specifying specific people, you can select up to 100.
Click Save Changes.
You can change who can post in any channel. A channel will be read-only for anyone without permission to post.
From your desktop, open the channel you'd like to adjust posting permissions for.
Click the channel name in the conversation header.
Select the Settings tab.
Next to Posting permissions, click Edit.
Select who can post and reply to messages. If you're specifying specific people, you can select up to 100 per channel.
Click Save Changes.
Tip: On the Business+ and Enterprise Grid plans, owners and admins with permission can manage channel posting permissions with channel management tools.
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