User login differences between MediaBeacon and IBM WebSphere Portal servers
You can log in to the portal server multiple times with the same user ID at the same time. However, the MediaBeacon server supports only one concurrent login session per user ID. If two portal users that are using the same user ID try to access assets from the MediaBeacon server at the same time, only the first user to connect can access the assets in the repository. The second user cannot access the MediaBeacon server until the first user is done working with the repository.
Parent topic: Rich Media Edition: Integrating with MediaBeacon