See also Using Zimbra with Apple iOS Devices (IMAP)

See also Using Zimbra with Android Mobile Devices

The Zimbra Network Editions include Exchange ActiveSync (EAS) support. Use IMAP if you don't have EAS support on your Zimbra server.

The Zextras add-on package also adds EAS support to the Zimbra Open Source Edition.

In general, you will be required to use a PIN to unlock your phone in order to use Zimbra with an EAS account.

Our public Zimbra server has mobile support using the Exchange ActiveSync protocol (EAS) with 'push' notifications.

EAS will sync:

• Folders
• Mail
• Contacts
• Calendars
• Tasks

All modern iOS devices support 'Exchange' or 'EAS' accounts without installing any apps.

https://support.apple.com/en-us/HT201320

This was done using iOS 8.1.3

On your iOS device, add a new Exchange/EAS/Corporate account for the new server.

1. Tap Settings
   
   
   
2. Scroll down, tap Mail, Contacts, Calendars
   
   
   
3. Tap Add Account
   
   
4. Tap Exchange
   
   
   
5. Enter your Email address, Password and a Description and tap Next
   
   
   
6. Enter Server zimbra.virtualarchitects.com
   
   
7. Leave Domain blank
   
   
8. Use your full email address as username
   
   
9. Enter your password
   
   
10. Tap Next
    
    
11. Tap Save