The Office apps for phones using Windows 10 Mobile – Word, Excel, PowerPoint, OneNote -- will reach end of support on January 12, 2021. On that date, app users will no longer receive security updates, non-security hotfixes, free assisted support options or online technical content updates from Microsoft. This decision follows the earlier announcement that support for Windows 10 Mobile ends on December 10, 2019.
Microsoft remains committed to providing a great Office experience on phones for consumer, commercial, education, and government users through the iOS and Android apps which continue to be supported. You can get the Office iOS and Android apps through the app stores for those platforms.
What does end of support mean?
The mobile apps for Office are governed by Microsoft's Modern Lifecycle Policy. Microsoft provides bug fixes and security fixes to support the product experience through the end of this lifecycle, known as the product's end of support. On January 12, 2021, you will no longer be able to install these Office apps on phones using Windows 10 Mobile and Microsoft will no longer provide the following support:
Technical support for issues
Bug fixes for issues that are discovered
Security fixes for vulnerabilities that are discovered.
What are my options?
If you already have the apps installed before the end of support date, the apps will continue to work. However, because of the lack of security updates, we strongly recommend that if you wish to use Office on a phone you transition to the latest Microsoft Office apps on an iOS or Android phone. Not only will you find Word, Excel, PowerPoint, and OneNote apps in the iOS and Android app stores, you will also find new innovations such as the Office app which provides a simple, integrated experience with Word, Excel, and PowerPoint all in one app with all the mobile features you already know and use.