Sign in to Microsoft 365
Should I stay signed in? We recommend staying signed in to Office so that your apps remain activated. What happens if I sign out of Microsoft 365 or Office? If you sign out, your apps will be deactivated. You can view and print files, but not create or edit files, until you sign back in. To learn more, see What happens when you sign out of Office.
Applies To: Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Project Online Desktop Client, Publisher for Microsoft 365, Excel for Microsoft 365 for Mac, Word for Microsoft 365 for Mac, Outlook for Microsoft 365 for Mac, PowerPoint for Microsoft 365 for Mac, OneNote for Microsoft 365 for Mac, Excel 2024, Word 2024, Outlook 2024, PowerPoint 2024, Access 2024, OneNote 2024, Project Professional 2024, Project Standard 2024, Visio Professional 2024, Visio Standard 2024, Office 2024, Excel 2024 for Mac, Word 2024 for Mac, Outlook 2024 for Mac, PowerPoint 2024 for Mac, OneNote 2024 for Mac, Office 2024 for Mac, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Excel 2021 for Mac, Word 2021 for Mac, Outlook 2021 for Mac, PowerPoint 2021 for Mac, OneNote 2021 for Mac, Office 2021 for Mac, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, OneNote for Mac, Microsoft 365 for home, Office 365 Small Business, Microsoft 365 admin, Project Online, Microsoft 365 for Mac, Project for Office 365
Verify your age for a Microsoft account. | Microsoft Support
Note Once completed, age verification applies to both your Microsoft account and XBOX account. If you don’t verify your age, your account will be treated as unverified. You can check your age assurance status on your Microsoft account. If one verification method doesn’t work, you can try another. Most verifications are completed in seconds, but some may take a few minutes.
Applies To: Microsoft account dashboard
Subscriptions & billing | XBOX Support
Find help managing Xbox subscriptions, resolving billing issues, and accessing related support resources.
XBOX Support
XBOX Support ... XBOX Support
Microsoft 支持 | Microsoft Support
Microsoft 支持可帮助你处理 Microsoft 产品的问题。 查找有关 Microsoft Copilot、Microsoft 365、Windows 11、Surface 等的操作方法文章、视频和培训。
August 11, 2026—KB5120249 (OS Builds 19045.7663 and 19044.7663)
Windows 10, version 22H2 Windows 10, version 21H2 Applies to: Windows 10 ESU Important Use EKB KB5015684 to update to Windows 10, version 22H2. This security update includes fixes and quality improvements that are part of the following updates: July 14, 2026—KB5099539 (OS Builds 19045.7548 and 19044.7548) The following is a summary of the issues that this update addresses when you install ...
Microsoft 支援服務 | Microsoft Support
Microsoft 支援服務在此協助您處理 Microsoft 產品。 尋找適用於 Microsoft Copilot、Microsoft 365、Windows 11、Surface 等的使用方法文章、影片和訓練。
2026 年 8 月 11 日 - KB5120249 (OS 内部版本 19045.7663 和 19044.7663)
Windows 10 版本 22H2 Windows 10 版本 21H2 适用于: Windows 10 ESU 重要 使用 EKB KB5015684 更新到 Windows 10 版本 22H2。 此安全更新包括修补程序和质量改进,属于以下更新的一部分: 2026 年 7 月 14 日 - KB5099539 (OS 内部版本 19045.7548 和 19044.7548) 以下是安装此更新时此更新解决的问题的摘要。 如果有新功能,它还会 ...
查找你的 Windows 产品密钥 | Microsoft Support
了解如何查找用于激活的 Windows 产品密钥,以及何时改用数字许可证。
Applies To: Microsoft account dashboard
KB5054156:使用启用包对 Windows 11 版本 25H2 的功能更新 | Microsoft Support
摘要 Windows 11,版本 24H2 和 25H2 共享一个具有相同系统文件集的通用核心操作系统。 因此,Windows 11版本 25H2 中的新功能包含在Windows 11版本 24H2 的最新月度质量更新中,但处于非活动状态和休眠状态。 这些新功能将保持休眠状态,直到它们通过“启用包”打开,这是一个可激活Windows 11版本 25H2 功能 ...