Set up your Microsoft 365 sign-in for multi-factor authentication
Learn how to set up your user account for multifactor authentication with Microsoft 365.
Applies To: Microsoft 365 admin
Unexpected UAC prompt after you install update 2918614 in Windows
Fixes an issue in which you have to provide consent when you start a program. This issue occurs after update 2918614 is installed in Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Server 2008 R2, Windows Vista, or Windows Server 2008.
February 10, 2026—KB5075904 (OS Build 17763.8389)
Applies to: Windows Server 2019 This security update includes fixes and quality improvements that are part of the following updates: January 13, 2026—KB5073723 (OS Build 17763.8273) January 17, 2026—KB5077795 (OS Build 17763.8280) Out-of-band January 24, 2026—KB5078131 (OS Build 17763.8281) Out-of-band The following is a summary of the issues that this update addresses when you install ...
Phone Link & cross-device experiences
Find help and support content for Microsoft Phone Link. Learn time-saving tips and explore how you can use Phone Link to stay productive.
Show or hide subtotals and totals in a PivotTable
Show or hide subtotals and grand totals in a PivotTable to add or remove them, and calculate them with or without filtered items.
Applies To: Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel 2024, Excel 2024 for Mac, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2016
Unlock a file that has been locked for editing - Microsoft Support
Use your mobile device to unlock or edit a file that another user has locked for editing.
Applies To: Excel for iPad, Word for iPad, PowerPoint for iPad, Excel for iPhone, Word for iPhone, PowerPoint for iPhone, Word for Android tablets, Excel for Android tablets, PowerPoint for Android tablets, Excel for Android phones, Excel Mobile, PowerPoint for Android phones, PowerPoint Mobile, Word for Android phones, Word Mobile
Add alternative text to a shape, picture, chart, SmartArt graphic, or ...
Create alternative text for pictures, charts, or SmartArt graphics so that it can be used by accessibility screen readers.
Applies To: Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access 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, Excel 2024, Outlook 2024, PowerPoint 2024, Access 2024, Excel 2024 for Mac, Word 2024 for Mac, Outlook 2024 for Mac, PowerPoint 2024 for Mac, Excel 2021, Outlook 2021, PowerPoint 2021, Access 2021, Excel 2021 for Mac, Word 2021 for Mac, Outlook 2021 for Mac, PowerPoint 2021 for Mac, Excel 2019, Outlook 2019, PowerPoint 2019, Access 2019, Excel 2016, Outlook 2016, PowerPoint 2016, Access 2016
Insert the current date and time in a cell - Microsoft Support
Let's say that you want to easily enter the current date and time while making a time log of activities. Or perhaps you want to display the current date and time automatically in a cell every time formulas are recalculated. There are several ways to insert the current date and time in a cell.
Applies To: Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2024, Excel 2024 for Mac, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2016
Accessibility | Xbox Support
Find out which settings you can control in Microsoft Casual Games to make your gaming experience more comfortable.
在 Windows 上安装移动应用和Amazon Appstore - Microsoft 支持
安装Amazon Appstore 若要安装Amazon Appstore,需要从 Microsoft Store 安装它。 获取Amazon Appstore 安装完成后,Amazon Appstore和“适用于 Android 的 Windows 子系统™设置”应用将显示在“开始”菜单和应用列表中。 准备就绪后,打开Amazon Appstore并使用 Amazon 帐户登录。