Download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac. Set up Office apps and email on a mobile device. Small business help and learning. Learn how to download and install apps you need from your Microsoft 365 business subscription.

If you're having problems accessing Outlook.com, you can see the status of Microsoft Office Online Services at the Service Health portal. If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues . Last updated: 2 April 2024.

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.

If you pre-ordered a game and want to cancel, you can do so up to 10 days before the game launches at: Order history. After this time, you may be billed, and you’ll need to request a refund to cancel your order. For more info about digital game pre-orders, see: Pre-order Xbox digital games in the Microsoft Store.

Get the steps for changing your home page in Microsoft Edge, Internet Explorer 11, Google Chrome, Firefox, and Safari.

How to redeem a code on Xbox Series X|S and Xbox One. Press the Xbox button to open the guide, and then select Store. Press the View button to open the side menu, and then select Redeem. Enter the 25-character code, select Next, and then follow the prompts.

Manage email accounts in Outlook.com. Unblock my Outlook.com account. Supported browsers for Outlook on the web and Outlook.com. If you sign in with a work or school account, read How to sign in to Outlook on the web.

您可以查看和订阅 rss 源列表或库，或者甚至视图有筛选信息或自定义列的位置。 RSS 源帮助您将来自不同网站的更新合并到 RSS 阅读器中。 RSS 源是定期发送的，它显示在 RSS 阅读器中，在该阅读器中，您可以管理对其他类型的信息（例如来自新闻或博客网站的 ...

Examples. Following are examples of some common nested IF (AND ()), IF (OR ()) and IF (NOT ()) statements in Excel. The AND and OR functions can support up to 255 individual conditions, but it’s not good practice to use more than a few because complex, nested formulas can get very difficult to build, test and maintain.

Outlook.com 检查传入的电子邮件，以确定它们是否是发件人订阅的一部分。 筛选掉垃圾邮件后，它会在邮件头中查找订阅标识符。 Outlook.com 提供了一种在一个位置管理电子邮件订阅和阻止发件人的便捷方法，从而更轻松地选择退出不需要的电子邮件列表。