Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and ...

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

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Microsoft Store apps updates Change log Highlights This update addresses security issues for your Windows operating system. Improvements This security update contains fixes and quality improvements from KB5070311 (released December 1, 2025). The following summary outlines key issues addressed by this update. Also, included are available new features.

Contact support in Outlook for iOS or Android Send feedback for Outlook for iOS or Android

To change the Copilot app shortcut key, go to Account > Keyboard Shortcut and type in a different shortcut combination. You can also delete the shortcut key to remove it altogether.

If you're an enterprise user, see Microsoft Store apps - Configuration Manager. If you're a consumer user, see Get updates for apps and games in Microsoft Store.

Microsoft Authenticator is a free app that helps you sign in to all your accounts without using a password - just use a fingerprint, face recognition, or a PIN.

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Open the Teams app or Teams on the web to sign in with your Skype account. On the Welcome screen, select Get Started to proceed. If prompted, verify your profile picture and choose Continue. You can change your profile name or picture at any time after setup by tapping on your profile on the top-right of Teams.