This page provides support links for home users and support phone numbers for business users.

Important: With two-step verification, you always need two forms of identification. This means that if you lose your phone, your password alone won't get you back into your account. For that reason, we strongly recommend you have three different sign-in methods associated with your account.

Get answers to some basic questions about what two-step verification is, and how to set it up and use it to help keep your Microsoft account more secure.

重要: 对 Office 2016 和 Office 2019 的支持已于 2025 年 10 月 14 日终止，并且不会有扩展安全更新。 所有 Office 2016 和 Office 2019 应用将继续正常运行。 但是，你可能将自己暴露在严重并且可能有害的安全风险之下。

Here are the most likely causes for an unrecognized charge: A Microsoft subscription has recurring billing enabled. Someone you know, such as a family member, bought something with your card. You can now investigate this on the Manage your payments page. A previously declined charge was charged again. A pre-order or split order was shipped. Someone made an in-app purchase from an app, game, or ...

Using Authenticator as a way to sign in If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in: Go to the site where you want to sign in. Enter your username at the sign-in prompt and select Next. Select Send notification.

The type of support Microsoft provides for consumers depends on the product you're calling about and if you have a product for home or for business use. It can also depend on if you want help for an issue with a service like OneDrive or Outlook.com, or help with Windows, but you don't have an existing Microsoft 365 subscription.

Learn how to set up your user account for multifactor authentication with Microsoft 365.

Learn how to manage your Microsoft account security info and troubleshoot verification code issues.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.