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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

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

KB5005413: Mitigating NTLM Relay Attacks on Active Directory Certificate Services (AD CS)

Find out how to submit a request for a refund for a purchase of digital Xbox content.

Use the Information Protection viewer to view protected files in Windows, Android, iOS, or Edge.

Learn how to protect your PC, identity, and data from tech support scams.

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

The Facilitator agent works within Teams meetings for more effective collaboration, including the following features: Generates real-time AI-generated notes during meetings, allowing everyone to co-author and collaborate seamlessly. Summarizes key decisions and open questions from meeting discussion. Answers open-ended questions in the meeting chat from the meeting participants. Documents ...

Alpha Skip-Ahead Ring (2606.260430-2200) Hey Xbox Insiders! We are releasing a new Xbox Update Preview to the Alpha Skip-Ahead ring today. Continue reading below to learn all about what's included with this update.

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