Applies to: Windows Server 2016 This security update includes fixes and improvements that are a part of the following update: January 13, 2026—KB5073722 (OS Build 14393.8782) The following is a summary of the issues that this update addresses. The bold text within the brackets indicates the item or area of the change we are documenting. [Graphics] Fixed: A stability issue affecting certain ...

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

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

Xbox Support ... Xbox Support

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Things to try if you've purchased Copilot but don't yet see it in your Microsoft 365 apps.

Omega Ring (2605.260429-2200) Hey Xbox Insiders! We are releasing a new Xbox Update Preview to the Omega 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

Learn how to set up your user account for multifactor authentication with Microsoft 365.

Omega Ring (2604.260408-2200) Hey Xbox Insiders! We are releasing a new Xbox Update Preview to the Omega ring today. Continue reading below to learn all about what's included with this update.