Sign-in options Usage Guidelines URL: Privacy Policy URL: ...

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

The type of support Microsoft provides depends on the product you're calling about and if you have a product for home or for business use. It can also depend on if you want help for an issue with a service like OneDrive or Outlook.com, or help with Windows, but you don't have an existing Microsoft 365 subscription. Learn more about which products are included for home or for business.

Learn how to use Microsoft 365 Copilot, your AI-first productivity assistant across Word, Excel, PowerPoint, Outlook, Teams, and more.

注意 你的 Hotmail 或 Outlook.com 密码与你的 Microsoft 帐户密码相同。 如果可以登录但 Outlook.com 出现问题，检查 服务状态。 如果状态不是绿色，请等到服务正常运行再重试。 Microsoft 始终保持留意异常的登录活动，以防其他人试图登录到你的帐户。 如果您在去新地方的旅途中或使用新的设备，我们可能 ...

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 ...

Learn how to check for the latest Windows Updates and install them to keep your device running smoothly and securely.

This article describes the formula syntax and usage of the WEEKDAY function in Microsoft Excel. Description Returns the day of the week corresponding to a date. The day is given as an integer, ranging from 1 (Sunday) to 7 (Saturday), by default. Syntax WEEKDAY (serial_number, [return_type]) The WEEKDAY function syntax has the following arguments: Serial_number Required. A sequential number ...

Search for help on the taskbar, use the Tips app, select the Get help link in the Settings app, or go to support.microsoft.com/windows.

Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.