Microsoft Outlook is one of the world’s most popular email and calendar clients. While many users are familiar with the desktop app (part of Microsoft Office) or the mobile app, there’s a third, increasingly popular option: Outlook as a Progressive Web App (PWA) .
You use Outlook.com or Microsoft 365 for email/calendar and want a clean, dedicated workspace.
This guide explains what an Outlook PWA is, its key benefits, and step-by-step instructions for downloading and installing it on Windows, macOS, or ChromeOS. A Progressive Web App (PWA) is a website that behaves like a native desktop application. When you install Outlook as a PWA, you are essentially wrapping the Outlook web interface (Outlook.com or your organization’s webmail) into a standalone window with its own icon, notifications, and taskbar presence.
You need advanced automation (rules, macros), manage PST files, or work extensively offline with large mailboxes. Last updated: March 2025. Compatible with Windows 10/11, macOS 11+, ChromeOS, and Linux (via Chrome/Edge).