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About MultiJoin

MultiJoin is an interoperability feature that, when configured, lights up the green join button on StarLeaf room systems invited to third-party meetings. When a user schedules a meeting using a third-party platform, they can add a StarLeaf room system from their room resources to the location field of the meeting invite.

The following third party meeting providers can be configured with MultiJoin:

  • Microsoft Teams*
  • Zoom
  • BlueJeans
  • Pexip
  • Webex
  • Skype for Business

*For more information on MultiJoin for Microsoft Teams, see MultiJoin for Microsoft Teams.

In the example below, a person using the Zoom plugin for Microsoft Exchange included the room Belfort in their meeting invite:


All MultiJoin integrations require a StarLeaf Enterprise Room Subscription, and your room system must have a room mailbox. For information on how to set up Microsoft Exchange, see Create and manage room mailboxes .

Some other prerequisites are required for certain third-parties:

  • Zoom: a Room Connector plan
  • BlueJeans: a My Company service plan

For prerequisites for Microsoft Teams, see MultiJoin for Microsoft Teams.

Room system address

You will need to note down your room system’s .call.sl address. This is found on the home screen of the touchscreen controller:

If your room system does not have a .call.sl address configured, see How to add a video address to a StarLeaf room system.

How to setup MultiJoin

To setup MultiJoin, you must configure your room system’s mailbox so that all meeting invites are forwarded to its .call.sl address.

MultiJoin for Microsoft Exchange

  1. Log in to the Exchange admin enter (as an admin).
  2. Go to Mail flow > Rules.
  3. Create a new rule.
  4. At the bottom of this screen, select More options.
  5. Set Apply this rule if… and add the following two rules:
    • The recipient is… and select the name of the room account. You can click More options to add a second condition.
    • The message properties… > include the message type and choose Calendaring

  6. Go to *Do the following… > Cc the message to…

  7. Enter the .call.sl address of the room using Check names.
  8. Select Save.

Testing the configuration

It is recommended that you test the MultiJoin configuration by scheduling a third-party meeting, and adding or inviting your StarLeaf room system using its .call.sl address. Scheduled meetings appear on the home screen of your touchscreen controller, and will light up green ten minutes before the meeting is due to start.

How languages are supported

When a participant uses the StarLeaf join button for a third-party meeting, they will be greeted in the language appropriate to the location of the data center in which the organization’s StarLeaf account is hosted. For example, if your StarLeaf account is hosted in StarLeaf’s data center in Germany, you will be greeted in German.

StarLeaf and Zoom

You can join a Zoom meeting from StarLeaf for desktop and mobile, but only if the Zoom host has the required license that allows external platforms to join.

If the Zoom license allows this, Zoom meeting invites will contain the additional dial-in information for external platforms. If the invite does not have this information, the best option is to invite the Zoom user to join a StarLeaf scheduled meeting.

Although you can join a Zoom meeting from StarLeaf, you will not have access to some features of the Zoom meeting such as chat or interactive whiteboarding.


MultiJoin does not support creating a green button for a single occurrence of a recurring third-party meeting.