IMAP Settings for a Shared Mailbox (Office 365 Exchange Online)

In order to connect to a shared mailbox you need to specify the shared mailbox alias in the IMAP user name.
Syntax: user\alias

Exchange Configuration:

• User Email: user@yourdomain.tld
• Shared Mailbox: shared@yourdomain.tld (or other domain)
• Shared Mailbox Alias (Name): shared-mailbox-alias

Important: Create the unique "Shared Mailbox Alias" with the mailbox!

IMAP Settings:

• Server Type: IMAP - SSL Encrypted
• Port: 993
• Email Address: shared@yourdomain.tld
• IMAP Server: outlook.office365.com
• User Name: user@yourdomain.tld\shared-mailbox-alias (Syntax: user\shared-mailbox)
• Password: user's password