See the Hangouts Help Center for everything you need to know about joining Hangouts video calls.
Video calls in Google Calendar events have customizable names that are private to your domain. External guests can join your video calls, but they must be directly invited to the event or video call.
For more information on named video calls, see our printable guide.
If you choose the same video call name as another person in your domain, then you will join the same meeting. If firstname.lastname@example.org and email@example.com both create a video call named “staff-meeting”, they will join the same video call.
However, external users will only see the Hangout and participants associated with the event they were invited to. If an external participant of firstname.lastname@example.org's event joins “staff-meeting” first, then the external participants of email@example.com will not be able to join.
Yes. Learn more.
Users can still invite external users (users outside the organization's domain) to a video call even if the administrator disables Hangouts chat outside of the domain.
See our printable guidefor more information.
If you choose the same video call name as a person in another domain, you are not affected. If firstname.lastname@example.org and email@example.com both create a video call named “staff-meeting”, they will not end up the same video call.
Users who are in the same domain where the video call was started can eject other participants. For example, if firstname.lastname@example.org created the video call, she can also eject participants. Other users from that same domain, such as email@example.com, can also eject participants. Users do not need to be administrators.
This allows users from the organization that created the meeting to control who can participate. Users from a different organization, such as firstname.lastname@example.org, cannot eject anyone.
Initiating an audio-only call is not available. However, all participants can switch to audio-only during a Hangouts video call.
For more information for users, see the Google+ Hangouts Help Center.