A shared mailbox provides a generic email address (for example, info@contoso.com or sales@contoso.com), that customers can use to inquire about your company.
It allows departments that provide centralized services to employees (for example, help desk, human resources, or printing services), to respond to employee questions.
It allows multiple users to monitor and reply to email sent to an email address (for example, an address used specifically by the help desk).
