Important: In Excel 2016, Excel Mobile, and Excel for the web, this function has been replaced with the CONCAT function.Although the CONCATENATE function is still available for backward compatibility, you should consider using CONCAT from now on. This is because CONCATENATE may not be available in future versions of Excel.

Change display name. You use your display name whenever you sign in to your account. You'll also see it on any Windows devices that you've signed into with your Microsoft Account, and it's the name people see when you send emails or participate in an Outlook.com group.

Get answers to all of your Microsoft Word questions. Find Word help, how-to articles, training videos, tutorials, and more.

Select Review activity to check for any unusual sign-in attempts on the Recent activity page.If you see account activity that you're sure wasn't yours, let us know and we can help secure your account—if it's in the Unusual activity section, you can expand the activity and select This wasn't me.If it's in the Recent activity section, you can expand the activity and select Secure your account.

Get Microsoft 365 support, help, and learning resources. Organize your life, expand your creativity, and protect what’s important with Microsoft 365

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Advanced email security. As a Microsoft 365 subscriber, you get enhanced security tools that help protect your inbox from phishing and malware.

How to access your Microsoft account? If you have confirmed that your email is a Microsoft account, you can access it by following these steps:

Microsoft Teams Web アプリは、Chrome、Firefox、Internet Explorer を含むほとんどのデスクトップ ブラウザーで動作します。

Tips: If you're using mobile data, try switching to Wi-Fi and vice-versa. Make sure Airplane mode is off.