zulip/templates/zerver/help/require-users-to-include-topics-in-stream-messages.md

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 permissions {!admin.md!}

2. Select the Require topics in messages to streams checkbox.

{!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.