Can users retrieve history messages from a group they are not in?

By default, users who are not in a group cannot retrieve its history messages. When this feature is enabled, users can retrieve history messages from a group even if they are not a member.

To enable this feature, go to the Basic Features page in the developer console, confirm that the correct app name and environment (Development/Production) are selected, and then click Enable.

Related documentation: Retrieve Historical Messages | RC Developer Documentation

If you have any questions about this feature, feel free to submit a ticket to us.