Select the product you need help with. We'll show you self-help options first. Additional help is available if you need it, including live chat with a Microsoft specialist. Microsoft 365. Office. Windows. Xbox. Surface devices. Copilot.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Depending on your product and if it's still in support, Microsoft support experts are available to help you with a broad selection of support options and able to address product and service challenges for a more personalized experience.

Open a service request in the Microsoft 365 admin center. This service is free. Get help and support, whether you're shopping now or need help with a past purchase. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

To use Microsoft 365 on your new device, you can activate Microsoft 365 as a 1-month trial of Microsoft 365 Family. You can also buy Microsoft 365, add Microsoft 365 to an existing Microsoft 365 subscription, or enter a product key from a new product key card.

When you enable an add-in, it adds custom commands and new features to Microsoft 365 programs that help increase your productivity. Because add-ins can be used by attackers to do harm to your computer, you can use add-in security settings to help protect yourself.

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

What is SharePoint? SharePoint is a collaborative platform designed to facilitate teamwork and streamline document management within organizations. It enables you to create websites, manage content, share information, and collaborate seamlessly across teams, enhancing productivity and communication. Find out more.

对于 Microsoft 365 家庭或个人订阅： 选择 “安装高级 Microsoft 365 应用 ”，并按照提示安装或重新安装桌面应用。 在“Microsoft 365 订阅”选项卡上，选择“ 管理”。 在此处，你可以： 使用预付代码或卡续订订阅。 了解详细信息。