Adding Work Email : Apple
Choose your account
Go to Settings > Mail > Accounts > Add Account > Exchange.
Enter account information
Enter your email address and password. You can also enter an account description.
Description titles: Descriptions are only visible to you, on your device.
Connect to the Exchange Server
Your iOS device will try to find your Exchange Server. You may have to enter additional server information.
Server: webmail.psusd.us
Domain: PSUSD
Username: Email username w/o @psusd.us
Sync your content
You can sync Mail, Contacts, Calendars, Reminders, and Notes. When you're finished, tap Save.
Mail Sync : By default, Mail will sync only the last seven days.
Edit your Exchange settings
Tap Settings > Mail, and select your Exchange account, then tap Account Info.
Additional Settings
You can also go here to set up automatic out-of-office replies and change how often you want Mail to sync.