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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

If you want to turn off two-step verification and remove it for all devices, consoles, and apps that you use, follow the steps below. Important Because two-step verification is turned on, you’ll need two forms of identification to sign in to your account.

To use mobile apps on your Windows 11 PC, you need to install the Amazon Appstore. Once it's set up, you'll be able to browse and install mobile apps from a curated catalogue.

In certain countries and regions, mobile operator billing can be used as a payment option to buy subscriptions like Game Pass and content such as games, apps, music, HD movies, and TV shows on your Xbox console and Xbox.com.

Many apps allow you to authenticate by entering a code on another device such as a PC. If you want to sign in on a remote computer to install Authenticator, follow these steps.

You can easily insert a check mark (also known as a "tick mark") in Word, Outlook, Excel, or PowerPoint. These marks are static symbols. If you're looking for an interactive check box that you can click to check or uncheck, see: Add a check box or option button (Excel) or Make a checklist in Word. In your file or message, place the cursor where you want to insert the symbol. Open the Symbol ...

Once installed, open the Copilot app and sign in using your personal Microsoft Account. Signing into Copilot gives you access to your chat history, image creation, longer conversations, voice interactions, and other Copilot features.

Get an error message or error code when making a purchase on Xbox? Find out what they mean.

With two-step verification, you'll get a security code to your email, phone, or authenticator app every time you sign in on a device that isn't trusted. Need more help?

You can easily insert a special character, fraction, or other symbol in your Word documents. The most important thing to understand when inserting symbols, fractions, special characters, or international characters is that the font you use is critical. Not all fonts have the same characters in them. For example, the Elephant font has no fraction characters in it, while Verdana does. As a ...