Accessing a shared mailbox from a mobile device

Hexsysadmins 

You have to use IMAP, and you have to use the built-in mail client since most other mail clients now recognize O365.

Android

1. Go to Settings -> Accounts -> Add Account
2. Select “Email” for the default email app
3. Click on “Other Providers”
4. Enter the email address of the Shared Mailbox and select Manual Setup
5. Select IMAP
6. Enter your password (shared mailboxes have no password, so you must enter your password)
7. Enter the following IMAP settings and go to next when complete:
   1. Username changes to YourUsername@domain.com\SharedMailboxName
   2. Server changes to outlook.office365.com
   3. Port changes to 993
   4. Security type changes to SSL/TLS
8. Update the SMTP information (required for "send as")
   1. Server name changes to smtp.office365.com
   2. Security type changes to STARTTLS
   3. Username changes to your username
9. Set your account options (sync frequency, notifications, etc.)
10. If necessary, change the "account name" and "your name" fields - especially the "your name" field as this is what is displayed on outgoing messages

iPhone

1. Go to Settings
2. Go to Mail, Contacts, Calendars -> Add Account
3. Select Other
4. Select Add Mail Account
5. Enter the New Account Information and then select Next
1. Name the account
2. The email address of the shared mailbox
3. Your password
4. Description of the account
6. Ensure that IMAP is selected at the top
7. Fill in the Incoming Mail Server information
8. Fill in the Outgoing Mail Server information
9. Select Next and then finish creating the account