Your program's microsite URL that your applicants will use can be found in two places:
Your Event Dashboard
Select the Dashboard option in the top-left corner
RIGHT-CLICK on the "Preview Event Microsite" button, and select the "Copy link address" option
Your Event's Profile page
Go to Configuration -> Profile
Find the "URL" field directly under the "Evaluation Deadline" field. (the URL will always start with https://my.reviewr.com/site/...)
Highlight and copy the URL (make sure there are no SPACES in the URL after you've copied it).