The hamburger ( ☰ ) in the upper left corner is your path to all farm web sites, using a single login.
Complete the login process and your custom side menu will be built using your credentials, and you'll see the websites you have available.
All company sites require you to be logged in. If a site is not available after logging in, call the helpdesk.
Once you've logged in, your AD name will show in the menu bar at the top. Click on it when you need to log off.
Also, some sites have restricted access for certain areas. If you dont have access to a specific area and you believe you should, inform your supervisor and then call the helpdesk.
Some speciality links may dispaly across the top if you have access.