Methods, apparatus and computer program product that may include receiving, by one or more servers of a group-based communication platform and from a client of a first user with administrative privileges and associated with a first organization, a request to generate a shared communication channel on the group-based communication platform. A shared communication channel may be generated based on the request. A second request may be received by the one or more servers to provide at least one second user associated with a second organization access to the shared communication channel. Access may be provided to the second user. A message communication may be rendered in a shared communication channel interface associated with the shared communication channel with a graphical indicator that indicates the message communication is associated with the first organization.