If you can't sign in to your Outlook.com, Hotmail, Live, or MSN email account, or you're not sure how to sign in or sign out, here are some solutions.

Add a way to verify sign-in to your Microsoft account. Sign in to the Advanced security options page of your Microsoft Account. Sign in. Select Add a new way to sign in or verify then choose how you would like to receive security codes.

If your system is asking you for your BitLocker recovery key, the following information may help you locate your recovery key and understand why you're being asked to provide it. Important: Microsoft support is unable to provide, or recreate, a lost BitLocker recovery key.

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.

Mobile device or work phone call: Enter your mobile device number and get a phone call for two-step verification or password reset. For step-by-step instructions about how to verify your identity with a phone number, see Set up security info to use phone calls.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

了解如何兑换礼品卡、代码或 Office 产品密钥，以及如何在 Microsoft Store 在线商店、Windows 或 Xbox 上花费余额。.

This article applies to Office Home & Business, Office Professional, and individually purchased Office apps. To switch an Office install to or from Microsoft 365, see Switch your Office license. How you change the product key depends on your version of Office. Select your Office version from the tabs below.

Use Remote Desktop on your Windows, Android, or iOS device to connect to a Windows 10 PC from afar. Here's how to set up your PC to allow remote connections and then connect to the PC you set up.

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.