Microsoft Outlook

This article is about the desktop subscription software. For the web platform, see Outlook on the web. For the email service, see Outlook.com.

Microsoft Outlook
DeveloperMicrosoft Corporation
Initial releaseJanuary 16, 1997 (1997-01-16)
Stable release(s)
Office 2024 (LTSC)2408 (Build 17932.20700) / 10 March 2026 (2026-03-10)
Office 2021 (LTSC)2108 (Build 14334.20570) / 10 March 2026 (2026-03-10)
Office 2019 (LTSC)1808 (Build 10417.20108) / 10 March 2026 (2026-03-10)
Office 2021-24 (Retail)2602 (Build 19725.20172) / 10 March 2026 (2026-03-10)
Office 2019 (Retail)2509 (Build 19231.20194) / 14 October 2025 (2025-10-14)
Operating systemWindows, macOS, Android, iOS
TypePersonal information manager
LicenseTrialware
Websiteoutlook.office.com

Microsoft Outlook is a personal information manager software system from Microsoft, available as a part of the Microsoft 365 software suite. Primarily popular as an email client for businesses, Outlook also includes functions such as calendaring, task managing, contact managing, note-taking, journal logging, web browsing, and RSS news aggregation.

Individuals can use Outlook as a stand-alone application; organizations can deploy it as multi-user software (through Microsoft Exchange Server or SharePoint) for shared functions such as mailboxes, calendars, folders, data aggregation (i.e., SharePoint lists), and as appointment scheduling apps.

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