Visitors can open Avigilon Alta doors if you enabled the Send a CloudKey link to visitors toggle and specified which CloudKey Guests Entry IDs on the Admin Panel.
Make sure you include the ID of all the entries visitors need to access your space.
Visitors get door access for their scheduled visit via the notifcation they automatically receive when they are registered as visitors in Nexudus. All they need to do is click on the CLICK TO ACCESS button at the bottom of the email confirmation to unlock the relevant doors. No need to download the Avigilon Alta app!
The visitor's host is automatically notified as they are checked in to your space.