Internet Explorer 11 and Edge Legacy Support Ending Microsoft 365 apps say farewell to Internet Explorer 11 and Windows 10 sunsets Microsoft Edge Legacy Microsoft has announced that Microsoft 365 apps and services will no longer support Internet Explorer 11 (IE 11) by this time next year. Beginning November 30, 2020, the Microsoft Teams web app will no longer support IE 11. Beginning August 17, 2021, the remaining Microsoft 365 apps and services will no longer support IE 11. After March 9, 2021, the Microsoft Edge Legacy desktop app will not receive new security updates. This means that after the above dates, customers will have a degraded experience or will be unable to connect to Microsoft 365 apps and services on IE 11. For degraded experiences, new Microsoft 365 features will not be available or certain features may cease to work when accessing the app or service via IE 11. To ensure compatibility with legacy apps, the new Microsoft Edge has Internet Explorer mode. Apps and sites created for Microsoft Edge Legacy will continue to work in the new Microsoft Edge, but if a compatibility issue does arise, Microsoft has their our App Assure promise site to provide support. More help details are detailed below. Help For customers using IE 11 to access Microsoft 365 apps and services, or using Microsoft Edge Legacy as their preferred browser, Microsoft recommends the new Microsoft Edge and offer a range of support options to help transition. To begin, Microsoft recommends that customers first read this detailed article about how to plan for deployment. The article guides customers through key questions and offers a path forward for major steps in the transition to the new Microsoft Edge. Next, customers should determine what type of support they are looking for, if any. Customers with Microsoft Unified Support can reach out to that support service for help transitioning to the new Microsoft Edge. For customers who would like guidance on how to plan, deploy, or adopt the new Microsoft Edge, there’s FastTrack. FastTrack is available at no additional charge to customers with 150 or more paid seats of Windows 10 Enterprise. To get started, submit a Request for Assistance through the FastTrack site. And for those customers who prefer to get started on their own, Microsoft has provided self-guided deployment and configuration materials, complete with a series from Microsoft Mechanics, ready on their Docs site.