The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Support for Office 2021 will end on October 13, 2026. Learn more about your options for Office.

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.

Check Xbox services, games, and apps for service outages or functionality issues.

Microsoft サポートは、Microsoft 製品に関するサポートを提供します。 Microsoft Copilot、Microsoft 365、Windows 11、Surface などのハウツー記事、ビデオ、トレーニングを検索します。

注意 Microsoft Authenticator 不 适用于电脑或 Mac，因为出于安全原因，验证器应用是专为智能手机设计的。 了解详细信息。 Microsoft 不再支持超过一年的 Authenticator 版本。 始终使设备保持最新。 中国用户应阅读 如何在中国下载和使用 Microsoft Authenticator。

You can resolve problems with Microsoft Authenticator by checking the tips in this article and reviewing some of the known errors.

你拥有哪个版本的 Visio？ 继续之前，应先了解将使用的 Visio 版本：桌面应用还是 Web 应用版本。 仅某些版本的 Visio 包括桌面应用。 如果你有 Visio 计划 2 或非订阅版本（如 Visio Professional 或 Visio Standard 2024 、 2021 或 2019），则可以安装和使用桌面应用。 如果你有 Visio 计划 1，则访问 Visio 的唯一方法 ...

If you can't sign into your Microsoft account, use the sign-in helper to identify the problem. How to use the Microsoft account sign-in helper The tool will ask you to enter the email address or mobile phone number you're trying to sign in with and check the details you provide. If it detects a problem with your account, we'll tell you what you need to do to solve the problem. If the tool ...

SharePoint is a browser-based app that you connect to through your web browser. With SharePoint, you can do many things, such as: uploading and sharing files to your document library, collaborating on files with others, creating a team site or communication site, and more. If your organization has assigned you a license that includes SharePoint, you can sign in. In this article, we discuss the ...