Once Matter is an approved app within your Slack workspace or Microsoft Teams tenant, there isn't a direct ability to restrict who can add Matter to a new channel. This can subsequently cause unwanted activity and impact billing.
To prevent this from happening, you can control who can create new Matter channels. By default, everyone can create new Matter channels, but you can change this to Admins Only or No Members.
Note: This setting is only available for Matter Enterprise Grid workspaces.
Edit Channel Creation Permissions:
Open the Web App.
Go to Channel Settings, then the General section.
Scroll down to the section Channel Creation Permissions.
Select the appropriate permission type:
All Members
Admins Only
No Members
Click the Save button to confirm changes.
Message to Non-Authorized User Who Tries to Install Matter
If a non-authorized user tries installing Matter in a new channel, they will receive the following error message.
