Outlook 2003 received improved functionality in many areas, including better email and calendar sharing and information display, complete Unicode support, search folders, colored flags, Kerberos authentication, RPC over HTTP, and Cached Exchange mode.
Outlook 2003 yang diterima peningkatan fungsi di banyak daerah, termasuk email yang lebih baik dan berbagi kalender dan menampilkan informasi, lengkap, dukungan Unicode, folder pencarian, berwarna bendera, Kerberos authentication, RPC over HTTP, dan Cached Exchange mode.