Yes, the invite will expire after 3 days. I strongly suggest filtering the Status by "Invite Sent"> select the top box to select them all and then click Actions "Send Invites to Selected Users". It'll send invites to all Users selected on that page. You might have to do it for each page if you have several pages of Users that have the status of "Invite Sent"
Written by Saurabh Bajaj
Updated over a week ago