Microsoft Outlook

Microsoft Outlook
Developer(s)Microsoft Corporation
Initial releaseJanuary 16, 1997 (1997-01-16)
Stable release(s)
Microsoft 365 & Retail (Windows)2505 (Build 18827.20150) / 10 June 2025 (2025-06-10)
Microsoft 365 (Mac)16.98.0 (Build 25060824) / 10 June 2025 (2025-06-10)
Office 2024 (LTSC)2408 (Build 17932.20396) / 10 June 2025 (2025-06-10)
Office 2021 (LTSC)2108 (Build 14334.20090) / 10 June 2025 (2025-06-10)
Office 2019 (LTSC)1808 (Build 10417.20020) / 10 June 2025 (2025-06-10)
Operating systemWindows, macOS
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 suites. 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.

Other than the paid software on Windows and Mac desktops that this article talks about, the Outlook name also covers several other current software: