Step 1 – Tap ‘Settings’ then ‘Mail, Contacts, Calendars’ then ‘Add Account’.
Step 2 – Tap ‘Other’ at the bottom of the list.
Step 3 – Tap ‘Add Mail Account’.
Step 4 – Enter the name of the shared mailbox, the email address of the shared mailbox, your email password, a description for the account & then tap ‘next’.
Step 5 – IMAP is selected by default at the top of the new account screen. Enter the incoming mail server host name as ‘outlook.office365.com‘. Enter your email address followed by a backslash & then the shared email address in the username field. Example-
Enter the outgoing mail server host name as ‘smtp.office365.com’.
Enter your email address & password as the credentials for the Outgoing Mail Server.
Step 6 – Once the incoming & outgoing credentials have been entered tap ‘Next’ then ‘Save’