To best access G Suite Mail and Calendar on an iPhone/iPad, use the corresponding Google app: Gmail, Google Calendar.  You can opt to use the built in Apple apps as follows.

I: Before Setting up in Google or Apple Apps

To access Stony Brook's Google Apps on a mobile device using Apple or Google apps, you have to first change your NetID password in SOLAR.

It takes 10-15 minutes for the new password to take effect, so if your NetID password is not immediately accepted while following the below steps, it may be because your password is not yet synchronized with Google's servers. Wait a few more minutes and try again.

II. Setting up Google Apps

To use the Google Apps, download and sign into the Google Gmail and Google Calendar apps from the App store:

• Sign into Google Gmail App 
• Sign into Google Calendar app

III. Setting up Google Mail and Calendar in Apple Mail and Apple Calendar Apps

1. On your iPhone/iPad, open Settings
2. Scroll to Accounts & Passwords and tap to open it
   
3. Tap Add Account
   
4. Tap Google
   
5. Enter your first.last@stonybrook.edu email address and click Next
   
6. On the NetID Single Sign on screen, enter your NetID and NetID password and click Login
7. Select which services (Mail, Contacts, Calendars, and/or Notes) you'd like to sync to the Apple Apps on your iPhone/iPad by selecting the corresponding slider to  on and click Save (if prompted to keep or delete data from iPhone, select Keep)
   
8. To select which calendars to view in the Apple Calendar app on iPhone/iPad, open the Apple Calendar app  and tap Calendars at the bottom
   
9. Tap to select the calendars you'd like to display (a checkmark appears next to those that will display), and then click Done in the top right
   
10. Your Google Mail and Google Calendar(s) will now show in the Apple Mail and Calendar apps on your iPhone/iPad