Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

Learn the reasons why a subscription price might change.

Xbox Game Pass 订阅价格发生变化的最可能原因是，它已从试用价或促销价更新为全价。

Want to add a padlock to your email messages? You can use encryption and digital signatures in new Outlook, classic Outlook, and Outlook on the web for work or school accounts to increase the security of messages. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public ...

Learn how to use mobile operator billing as a payment option to buy Xbox subscriptions, games, and other content.

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 ...

How prepaid subscription time converts when upgrading to Game Pass Ultimate or Game Pass Premium When you upgrade to a Game Pass plan that includes benefits of a subscription you already have, we'll convert remaining prepaid time and apply it toward your new plan at the current conversion ratio. See below for Game Pass Ultimate and Game Pass Premium upgrade details.

Use a ready signature template from a gallery to create your email signature in Outlook.

在Outlook 中，可以为电子邮件创建一个或多个个性化签名。 签名可以包括文本、链接、图片和图像 (，例如手写签名或徽标) 。

Check the Xbox services, games, and apps for any service outages.