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

Find solutions for Xbox account and profile issues, manage settings, and get support for your Xbox experience.

Sign-in options Usage Guidelines URL: Privacy Policy URL: ...

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...

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摘要 Email 簽名能在你的商業溝通中建立專業一致性，並確保收件人在每則訊息中都擁有你的聯絡資訊。 在Outlook中，你可以為不同用途設定多個簽名 (內部與外部、個人與商務) ，並選擇是否自動包含在新郵件、回覆或轉寄中。 你的簽名可以包含文字、連結、圖片和圖片 (，例如你的手寫簽名或標誌 ...

Learn how to change Microsoft account email address using aliases to sign into your Microsoft account.

Find out how to use your Xbox Game Pass membership to share the benefits with your friends on any Xbox console.

Add your Google account On the Google account security page, go to the Add more second steps to verify it's you section, choose the Set up from the Authenticator app section. On the Get codes from Authenticator page, select either Android or iPhone based on your phone type, and then select Next.

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 ...