If everything is setup well (DNS for AutoDiscover), this should help you
- Open the settings app
- Choose Mail, Contacts, Calendars
- Choose Add Account
- Choose Microsoft Exchange
- Enter your grammm account settings (Email and password)
- Tap Next
- Select what you want to synchronize (Mail, Calendar, Contacts, etc.)
- Tap Save
From here you should be able to work with your data with the apps of your choice (Mail, Calendar, etc.).
After the account has been setup, you can go back to Settings and configure all kinds of more advanced settings, such as sync period (1 year, etc.) and other settings such as signatures and more.