Autodiscover is a feature used primarily in Microsoft Exchange and Office 365 that simplifies the configuration of email clients by automatically providing the necessary server settings. When a user enters their email address and password, Autodiscover retrieves relevant connection settings, such as server names and required protocols, allowing for seamless integration with mail services without manual configuration. This enhances user experience and reduces the burden on IT support. Autodiscover typically operates via DNS records to locate the appropriate service endpoints.