The following rules apply when sharing a topic to another community:
- The topic is always shared in the main level of topics within the shared community.
- The topic's original availability is always retained, regardless of the availability of the shared community. However, the availability of the shared community can be added to the shared topic.
- A topic must be associated with at least two communities to be considered shared. If a topic is only associated with a single community, then the topic is not considered shared.
- Unsharing a topic from all communities deletes the topic.
- When editing a community or topic, the editor can choose to apply the availability settings to all topics within the community or topic. However, a warning message is displayed to confirm the action.
- A shared topic cannot be deleted. Also, if a parent topic has shared subtopics, then the parent topic cannot be deleted.
- A user must match the availability of a shared topic to view the shared topic. However, a user does not need to match the availability of the topic's community to view the shared topic.
- A shared child topic cannot be unshared if the parent topic is shared.
- Creating a child topic within a shared topic automatically shares the child topic.
- Unsharing a parent topic automatically unshares any child topics.