Download Citrix Receiver at https://www.citrix.com/go/receiver.html.
If you’re using a Mac, go to System Preferences -> Sharing and change your computer name to something without any spaces (e.g. “DavidComputer”, not “David’s Computer”).
If you’re on the Mount Sinai network (on campus, Aron Hall, couples housing, etc.):
Open a web browser and go to http://intranet.mountsinai.org.
Click “Applications Web Based” at the top right, go to Citrix Desktop, and “Download ICA file for Citrix Desktop”.
You can save this file to your computer and double-click it each time you want to launch into Citrix. The two-factor code is not necessary.
If you're off campus:
Search for “VIP Access” on your smartphone (iOS or Android) and download the app. Alternatively, you can download an application for your computer.
Whenever you want to access Citrix, go to http://msvpn.mountsinai.org and log in with your username, password, and two-factor code.