Internet Explorer 11 now doesn't support Microsoft 365 apps and services

If you want to use modern web apps and services, you'll have to use a modern browser.

What you need to know

• You can no longer use Microsoft 365 apps and services on Internet Explorer 11.
• People may have a degraded experience or be unable to connect to Microsoft 365 services on the old browser.
• All modern browsers work with Microsoft 365 apps and services, including Edge, Chrome, and Firefox.

Yesterday, August 17, 2021, was officially the end of Microsoft 365 app and service support on Internet Explorer 11 (IE11). Anyone who tries to use Microsoft 365 apps and services on the out-of-date browser may have a degraded experience or be unable to connect. We've known about the end of support of these apps on IE11 for months, but the deadline has now passed.

Microsoft updated a Tech Community post with the following on July 23, 2021:

Beginning August 17, 2021, Microsoft 365 apps and services will no longer support Internet Explorer 11 (IE11) and users may have a degraded experience, or be unable to connect to, those apps and services. These apps and services will phase out over weeks and months to ensure a smooth end of support, with each app and service phasing out on independent schedules.

If you encounter issues while accessing Microsoft 365 apps and services from IE11 after August 17, 2021, support will be unavailable. Additionally, you should expect no new features and that your daily usage experience could get progressively worse over time until the apps and services are disconnected.

Microsoft also outlines the specific experiences that will be affected by the change that took place on August 17, 2021:

• Outlook Web App: Users logging in with AAD accounts will still receive the full OWA experience but will not receive new features beginning August 17, 2021, while users logging in with Microsoft Accounts (MSA) will be redirected to the Outlook Web App Light experience.
• Open with Explorer/View in File Explorer (SharePoint): We understand that some customers may continue to use Open with Explorer and View in File Explorer (only accessible in IE11) to access document libraries. To avoid disruption, these customers will be able to use these features for now when they go to a document library in IE11. These features remain in maintenance mode and aren't receiving further development. We encourage all customers to move to a modern browser and OneDrive sync for a better user experience and easier access to files. For more information on how to prepare your SharePoint environment for end of support on IE11, please read this Docs article.
• All other apps and services will phase out over weeks and months to ensure a smooth end of support with each app and service phasing out on independent schedules.

Luckily, there's no shortage of modern browsers on Windows 10. Microsoft Edge, Google Chrome, Mozilla Firefox, and many other browsers support Microsoft 365 apps and services.