- Microsoft Exchange Server is a messaging and collaboration software tool developed by Microsoft. Some of its features include email, calendar and support for mobile and web-based access to information. It is part of Microsoft Outlook, not Outlook Express.
- Microsoft Outlook's Out of Office Assistant features automatic replies to email when you are unavailable to answer them. This feature is not available in Outlook Express.
- Microsoft Outlook provides Multiple Address Books that you can use for various purposes. Outlook Express has only one address book.
- Information Rights Management functionality of Microsoft Outlook allows you to control whether recipients can print, copy or forward your email. If enabled, recipients cannot print, copy or forward your emails. This function is not available in Microsoft Outlook Express.
- With Microsoft Outlook's automatic backup function, you can archive items that are no longer needed. This helps to keep your mailbox size small. Automatic backup is not available with Microsoft Outlook Express.
- In Microsoft Outlook, you can use Microsoft Word as your email editor. You can use all the features of Word for creating and editing email. This feature is not available with Outlook Express.
- Microsoft Outlook's junk email filter feature scans and separates all junk email from the others. This feature is not available with Outlook Express.








