The CONCAT function combines the text from multiple ranges and/or strings, but it doesn't provide delimiter or IgnoreEmpty arguments.

Use Version History to view previous versions of files stored in OneDrive or SharePoint libraries.

注: Microsoft アカウントとして所有しているメール アドレスを使用するか、サインアップ時に [新しいメール アドレスを取得する] または [代わりにメールを使用する] を選択して新しいアドレスを作成できます。

In Outlook, the black color theme includes dark mode, which provides a black background (instead of white) for the message window. You can switch to a white background for the message window if you prefer.

Having a backup copy of your BitLocker recovery key helps to prevent serious issues later. It takes less than a minute to back up your key and this article will show you how.

Training: With a subscription to Microsoft 365, you get the latest apps like Microsoft Excel, Word and PowerPoint, storage, and updates.

Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

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.

How to track changes in Word using revision marks. Accept, reject, or hide changes made by others working in the file.

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.