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Require users to include topics in stream messages
{!admin-only.md!}
By default, users are not required to specify the topics of messages to streams; if a user sends a message without a topic, the message's topic is displayed as (no topic). Any other user can then edit the topic of such a message to set a topic.
Some organizations prefer to require that every message to a stream includes a topic. Organization administrators can choose to enforce the use of topics in new messages to streams:
{!go-to-the.md!} Organization settings {!admin.md!}
- Select the Require topics in messages to streams checkbox under the Message feed section.
{!save-changes.md!} organization settings.
Once this setting is enabled, any users that attempt to send a stream message without a specified topic will see a warning in the compose box and will be prevented from sending their message until they specify a topic.