====== Access Exchange shared mailbox in thunderbird ======
<code ini Exchange Configuration>
USER EMAIL: user@maindomain.com   
PASSWORD: password
SHARED MAILBOX: shared@anotherdomain.com      (could also be @domain.com, of course)   
SHARED MAILBOX ALIAS: shared-mailbox
</code>

**Note:** Please make sure to create the **UNIQUE alias** always with the mailbox, because it creates the user **[alias]@maindomain.com**. In this case **shared-mailbox@maindomain.com**

<code ini Settings for IMAP Configuration>
EMAIL ADDRESS: shared@anotherdomain.com (shared mailbox)
IMAP SERVER: outlook.office365.com   
SMTP SERVER: smtp.office365.com
USERNAME: user@maindomain.com\shared-mailbox  (user\shared mailbox alias)   
PASSWORD: password (user's password)
</code>

<code ini SMTP Login Is Different>
USERNAME: user@maindomain.com  (users email)   
PASSWORD: password (user's password)
</code>