1. Open a private chat with the bridge bot. Usually @hangoutsbot:your.server.
  2. Send login.
  3. Open the link sent by the bot and follow the instructions.
    • Automatic login may not work. If it does not, reload the page and select the "Manual login" checkbox before starting. Manual login involves logging into your Google account normally and then manually getting the OAuth token from browser cookies with developer tools.
  4. Recent chats should now get portals automatically. Other chats will get portals as you receive messages.