The COUNTIFS function is similar to the COUNTIF function with one important exception: COUNTIFS lets you apply criteria to cells across multiple ranges and counts the number of times all criteria are met. You can use up to 127 range/criteria pairs with COUNTIFS. The syntax for COUNTIFS is: COUNTIFS(criteria_range1, criteria1, [criteria_range2, criteria2],…)

You can use any phone number that can receive text messages; it doesn’t need to be associated with your account. We won't use or give out the phone number, and the code sent to it will expire after 10 minutes.

准备好安装了吗？ 在开始之前，请确保电脑或 Mac 满足 系统要求。. 如果你已兑换产品密钥，只需重新安装应用，或者知道你已通过工作或学校分配了许可证，则可以跳到登录部分 ，下载并安装 Microsoft 365 或 Office。 但是，如果是 首次 安装 Microsoft 365 或 Office，可能需要先执行一些步骤。

Sind Sie bereit zum Installieren? Stellen Sie zunächst sicher, dass Ihr PC oder Mac die Systemanforderungen erfüllt.. Wenn Sie bereits einen Product Key eingelöst haben, die Apps einfach neu installieren oder wissen, dass Sie über eine zugewiesene Lizenz über ein Geschäfts-, Schul- oder Unikonto verfügen, können Sie mit dem Abschnitt Anmelden fortfahren, um Microsoft 365 oder Office ...

Select a condition, and what to do with the message based on the condition. For example, to move messages with a certain title to a specific folder, select the Subject contains condition, select Move the item to folder, select or create a New folder, and then select OK.

In Outlook, you have the option to: Attach a file | Upload a locally saved file to your OneDrive | Insert a picture into the body of a message | Attach an email item | Solve problems with attachments. Attach a file to an email message in new Outlook. New Outlook keeps track of the files you have worked on recently and suggests them whenever you decide you want to attach a file to an email message.

Sometimes add-ins can conflict with Outlook. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem.

Check your computer's date settings. Excel uses your computer's date system. If a cell's date isn't entered using the same date system, Excel won't recognize it as a true date.

Designed by media lovers for media lovers. Windows Media Player 12—available as part of Windows 7, Windows 8.1, and Windows 10*—plays more music and video than ever, including Flip Video and unprotected songs from your iTunes library!

Access, download, or run the Surface app and the Surface Diagnostic Toolkit to help find and solve Surface problems.