Always access websites using trusted links. Scammers can copy the look of a company’s communications to fool you into clicking a phony link or attachment, so use caution with links that appear in unsolicited emails, social media, or SMS messages.

解决激活错误. 如果 Microsoft 365 无法激活，其最后会变为未授权，且 Microsoft 365 的所有编辑功能都会被禁用。 Microsoft 可能由于多种原因变为未授权。

If your account has been hacked, use our sign-in helper tool below to help guide you to the right solutions. The tool will ask for your email address or phone number, and either show appropriate self-help, or offer the chance to talk to an agent.

Select Notifications to expand it, and turn notifications, banners, and sounds on or off for some or all notification senders.

Notes: If your Android device is running Android 11.0 or higher, you may be eligible for the multiple apps experience. Compatible devices are marked with an asterisk (*).

Tip: For a faster, and more secure, experience we recommend using an authenticator app rather than SMS verification. Once you complete the instructions to specify your additional verification method, the next time you sign in to Microsoft 365, you'll be prompted to provide the additional verification information or action, such as typing the ...

Choose the mobile app. Open a browser on your computer and go to portal.office.com.Sign in to your Office 365 for business account.

Updated Files On-Demand settings on Windows.We are updating the OneDrive sync app advanced settings for Files On-Demand for users who have the feature enabled.

Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox).

Microsoft アカウントは 、個人 向けであり、Outlook.com、Xbox、Skype などのサービスにアクセスするためのものです。 Microsoft 職場および学校アカウントは、ビジネス向け Microsoft 365 を使用する 組織 向けです。. アカウントの種類を選択するか、 違いの詳細を確認してください。