Office 365 Exchange: How to access a Shared Mailbox using Thunderbird or other IMAP client

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I had trouble setting up Thunderbird to use a shared mailbox that was created in Exchange Online (Office 365 Enterprise) but I figured it out and thought I would share the settings.

Configure Thunderbird IMAP client to access shared mailboxes created in Exchange Online:

User Mailbox: john.smith@contoso.com
Shared Mailbox: info@contoso.com

Settings for IMAP Configuration:

  EMAIL ADDRESS: info@contoso.com (shared mailbox)
  PASSWORD: John Smith's Password (user's password)
  IMAP SERVER: outlook.office365.com (imap server)
  SMTP SERVER: smtp.office365.com (smtp server)
  USERNAME: john.smith@contoso.com\info (user\shared mailbox)
Once these settings are entered, the application can impersonate the user and access the shared mailbox.