This procedure is applicable to Nexus 4, Nexus 5, Nexus 6, Nexus 5X, Nexus 6P, Moto X Pure, BlackBerry Priv, and similar devices.
Gmail replaces the native email application on some mobile devices running Pure Android 5.0 (Lollipop) or higher software versions including Android 6.0 (Marshmallow). Pure is also referred to as Vanilla or Stock Android by mobile device manufacturers and software developers.
Many Android devices use proprietary user interfaces (UI) that utilize an Email app for Exchange and other email configurations in addition to, or sometimes in place of, the Gmail app. For those devices, you can use their respective Email app or the Gmail app for your Exchange email account.
Prior to starting this procedure, obtain your account-specific information from the Customer Portal according to the following article:
To setup an Exchange email account on the mobile device, take the following steps:
1. From the Home screen, swipe down and tap the Settings gear icon.
2. Scroll down and tap Accounts.
3. Tap Add Account.
4. From the Accounts screen, tap Add Account.
5. Tap Exchange.
6. Enter the email address and tap Next.
7. Enter the account password and tap Next.
8. The device will attempt to retrieve the account settings automatically. If unsuccessful, enter the account specific settings when prompted. Confirm the settings entered and tap Done.
9. Select Account Settings.
10. Review the default Sync Settings and make any changes as desired. Tap Next.
11. Select Review Permissions.
12. Review the Activate Device Administrator message and tap Activate this device admin app to complete account activation.
13. Tap Allow to allow Gmail access to your contacts.
14. Give the account a name (optional) and tap Done.
15. Open the Gmail application. You may receive a notification to update security settings. If the notification displays, tap accept to complete the account activation. Email will begin to arrive momentarily.
Google provides helpful resources for their software applications at the following support site: https://support.google.com/mail
For an official description of Pure Android, check out the official developers blog: http://developer.android.com/design/patterns/pure-android.html