Some Office 2019, Office 2016, and Office 2013 products come with a product key. If yours did, before installing Microsoft 365 for the first time, sign in with an existing or new Microsoft account and enter your product key at office.com/setup. Redeeming your key is what links your account with Microsoft 365 so you only have to do this once.

You can use installation media (a USB flash drive or DVD) to install a new copy of Windows, perform a clean installation, or reinstall Windows. To create installation media, go to the software download website, where you'll find step-by-step instructions.

If your organization uses Microsoft 365 Germany, sign in to the Microsoft 365 Software page at https://portal.office.de/OLS/MySoftware.aspx. If you still don't see an option to install Microsoft 365 on the Microsoft 365 Software page, it's possible your admin hasn't assigned a license to you.

Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue.

A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This key, which is a 48-digit number, is used to regain access to the drive. You might be prompted for the BitLocker recovery key during startup, due to a security risk or hardware change:

How malware can infect your device. Microsoft security help and learning. If you suspect that your device may have malware you should have Microsoft Defender run a scan. Here's how to do that on Windows, Mac, or Android.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription. Tip: Get tech expertise with Business Assist.

验证你拥有许可证后，无论何时需要安装或重新安装 Microsoft 365，都可以直接转到下一部分，即登录以下载 Office，然后选择相应的选项卡，以获得有关 PC 或 Mac 安装的步骤。. 你将使用这些版本的 Microsoft 365 的工作或学校帐户进行登录。. * 如果没有产品密钥或 ...

Text and array functions. There are now 14 new text and array functions in Excel 2024 that are designed to help you manipulate text and arrays in your worksheets. These functions make it easier to extract and split text strings and enable you to combine, reshape, resize, and select arrays with ease.

If you're trying to add your Outlook.com account to Outlook or another mail app, you might need the POP, IMAP, or SMTP settings. You can find them below or by viewing them in your Outlook.com settings.