[The following information comes from Google Apps for Business setup wizard]
Google Apps works great on iPhones and other iOS products, where you can access your email, contacts, and calendar using the device’s built-in apps. This is easy to set up, using Google Sync.
Want quick access to your apps? Skip all this and access your apps in a moblie browser by visiting http://mail.google.com/a/<your domain name> on mobile Safari.
Step 1: Enable Google Sync for your domain
- Go to the Settings tab above. Then select Mobile from the list of services at the left.
- Select the radio button next to Enable Google Sync.
- Click Save changes.
Step 2: Sync an iPhone with Google Apps
After you enable Google Sync for your domain, have each user follow these instructions on their iPhone.
- Open the Settings application on the iPhone’s home screen.
- Open Mail, Contacts, Calendars.
- Tap Add Account….
- Select Microsoft Exchange. [NOTE: screens may be different depending on your version of iOS]
- In the Email field, enter your full Google Apps email address.
- Leave the Domain field blank.
- Enter your full Google Apps email address as the Username.
- Enter your Google Apps password as the Password.
- Tap Next at the top of your screen. (Choose Cancel if the Unable to Verify Certificate dialog appears.)
- When the new Server field appears, enter m.google.com.
- Press Next at the top of your screen again.
- Select the Google Apps services (Mail, Calendar, and Contacts) you want to sync.
- Unless you want to delete all the existing Contacts and Calendars on your phone, select the Keep on my iPhone option when prompted. This will also allow you to keep syncing with your computer via iTunes. To sync only the My Contacts group, you must choose to Delete Existing Contacts during the Google Sync install when prompted. If you choose to keep existing contacts, it will sync the contents of the “All Contacts” group instead. If there are no contacts on your phone, the latter will happen — the contents of your All Contacts group will be synced.
That’s it! You can now access Google Apps from your iPhone. If you have Push enabled on the phone, synchronization starts automatically. You can also just open the Mail, Calendar or Contacts app and wait a few seconds to start a sync.