Microsoft Outlook - IMAP
Go to the Settings app on your iPhone.
Select "Mail, Contacts, Calendars"
Then "Add Account"
Select " Other"
and finally " Add mail Account"
Select POP or IMAP and click Next.
Fill in your account details.
Your Name: your name as you wish it to appear on outgoing email messages
E-mail Address: your email address
Account Type: select IMAP from the dropdown list
Incoming mail server: zimbra.protectedservice.net
Outgoing mail server (SMTP): smtp.protectedservice.net
User Name: your email address
Password: your email address password (found in the email we sent you with the subject line 'Webmail / IMAP - [Your company name]')
When you have entered the relevant details, click More Settings.
Click the Outgoing server tab and select the checkbox My outgoing server (SMTP) requires authentication.
Ensure the radial button Use same settings as my incoming mail server is also selected.
Click the Advanced tab.
Select SSL as the encrypted connection type for the incoming server and set the port number to 993.
Select TLS as the encrypted connection type for the outgoing server and set the port number to 587.
Click OK and then click Next.
Outlook will now test the settings you've entered.
If correct, click Close and then click Finish in the following window.