Joining Zoom Meeting To Join a Zoom meeting, open Zoom App. Originator must send you Meeting ID & Passcode. Select Join a Meeting Enter the Meeting ID (Originator must send you Meeting ID & Passcode). Once you enter the information, the Join button will turn blue. Press Join. If prompted for passcode, enter the information. This was sent by originator’s zoom invite. Then click Join Meeting. Select Join with Computer Audio when the option appears.