Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser.

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

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

Get support, help, and learning resources for Microsoft 365. Organize your life, expand your creativity, and protect what’s important with Microsoft 365.

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

Applies to: Windows Server 2016 This security update includes fixes and improvements that are a part of the following update: April 14, 2026—KB5082198 (OS Build 14393.9060) April 19, 2026—KB5091572 (OS Build 14393.9062) Out-of-band 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 ...

Phishing (pronounced: fishing) is an attack that attempts to steal your money, or your identity, by getting you to reveal personal information -- such as credit card numbers, bank information, or passwords -- on websites that pretend to be legitimate. Cybercriminals typically pretend to be reputable companies, friends, or acquaintances in a fake message, which contains a link to a phishing ...

Open a new email message. On the Message tab, select Signature, and then select Signatures. In the E-mail account list, pick the email you want. Under Select signature to edit, select New, and type a name for the signature. Select OK. Type the signature you want in the Edit Signature box. Format the signature as needed, and then select Save. More on creating signatures

Learn how to use encryption and other security settings to protect messages sent from Outlook.

This cumulative update for Windows 11, version 25H2 and 24H2 (KB5095093), includes production-quality improvements. Announcements and messages This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices. Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to ...