If you are invited to a Sync Meeting either by a peer or your instructor you will need to accept the invitation in order to join the meeting.
To view and accept the invitation you will first need to click on Meeting Schedule at the top of the screen. Once there you will need to click View invite.
Once you are viewing the invite you will choose to Accept or Decline the invitation. Choose Accept to access the meeting.
Once you have accepted the meeting, you will be able to join the meeting. When you join the meeting you will be taken to the meeting lobby page.