升级 Office 的选项会有所不同，具体取决于你当前拥有的 Office 产品的类型。 如果你的当前版本是一次性购买的非订阅 版 Office，例如 Office 家庭 & 企业版，请参阅下文。 如果已有 Microsoft 365 订阅，请选择下面的 “Microsoft 365 ”选项卡。

If you have multiple accounts in Outlook, when you compose a new email message, Outlook picks the default account as the From account.However, if you want to Reply, Reply All, or Forward a message, Outlook will send your message with the same account the original mail was sent to.For example, Cheryl has two accounts.

Learn how to join a Microsoft Teams meeting by link, calendar, channel, chat, or by calling in.

The Tasks app in Microsoft Teams brings together your individual tasks from To Do and Outlook with your team tasks from Planner so you can more efficiently cross them off your lists.

Learn how to cancel your Microsoft subscriptions such as Microsoft 365, Copilot Pro and Xbox. Troubleshoot issues if you can't cancel your subscription.

Outdated software can cause problems with a Windows upgrade, so removing old or nonessential applications can help. If you plan to reinstall the application later, make sure you have the installation media and all required activation information before removing it.

Internet Explorer 11 support ended on June 15, 2022. We recommend you use Microsoft Edge for a faster, more secure and more modern web browsing experience.

With Edge Chromium, you can add multiple profiles. Profiles allow multiple users to operate in a shared environment while maintaining access to their personalized browser settings, bookmarks, and extensions.

In Microsoft Forms, use form settings to specify deadlines, identify form responders, display correct answers for quizzes, and to set other preferences.

For more information about how to customize the ribbon, see Customize the ribbon in Office.. When custom groups show a green or blue ball on the Quick Access Toolbar. Icons represent custom groups of commands on the Quick Access Toolbar when an icon is chosen.