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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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 ...

如果我的代码来自其他区域，该怎么办？ 某些数字代码适用于可能与帐户上的区域设置不匹配的特定国家/地区。 如果你的帐户与你的物理区域匹配，并且你的代码是从你所在地区的零售商处购买的，请确保设备上的区域也与你的物理位置匹配。 若要从 Xbox 主机执行此作，请执行以下作：

A phishing email is an email that appears legitimate but is actually an attempt to get your personal information or steal your money. Some deceptive emails appear to be from a safe sender but, in fact, have a "spoofed" source address to fool you. Here are some ways to deal with phishing and spoofing scams in Outlook.com. Spoof intelligence in Exchange Online Protection helps prevent phishing ...

瞭解如何透過瀏覽器、Xbox 主機或 Windows 裝置變更您的 Xbox 玩家代號。

To connect your Outlook calendar to your iPhone, you can add an Outlook account to your iPhone's Calendar app. Open your iPhone Settings. Scroll down to Apps, then tap Calendar. Tap Calendar Accounts, then either select an existing account or tap Add Account. If you need to add the account, select Outlook.com, then follow the prompts to add the account. Go back to the Accounts list and select ...

Find everything you need to know about Xbox gamertags.

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

Learn how to change your Xbox gamertag on the web, Xbox console, or Windows device while adhering to Xbox Community Standards.

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

Hotmail is now Outlook.com To sign in to Hotmail, you'll need your Microsoft account username and password. Sign in at outlook.live.com