Like the website and app, your conversations continuously sync across your account.Any Google video call (Hangout) will be restricted to the UMN domain by default, limiting the call initially to the participants from your domain. If you share that link with someone and they click it, they can join the video call by simply signing in with their Gmail account. There’s also an option to share a link to an ongoing video call.
If you start a new conversation with someone who does not use Hangouts yet by entering their email address or phone number, it will send them an invite to use the service.You can then type in the name, email address, or phone number of an existing Hangouts user to start a text-based conversation or video call.Tap the green and white “+” button at the app’s bottom right and select either New conversation or New video call.
How to start a new conversation or video call