A guest is someone who is not part of your team, but works with your team (e.g. a contractor).

To add them to a conversation:

1. Send the guest a contact request from your team account.
2. Open a conversation with the guest from your team account.
3. Start a group conversation, or add the guest to an existing group.

On desktop:

In the conversation list:

1. Click the conversation that you'd like to add a guest to.
2. Click the conversation name.
3. Click Guest Options.
4. Toggle to Allow guests and services.
5. Click  Add Participants.
6. Select the guest you'd like to add.
7. Click add people to Group.

A banner at the top of the conversation will appear stating GUESTS ARE PRESENT.