Digital signatures and certificates - Microsoft Support
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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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 ...
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, Visio Plan 2, Excel 2024, PowerPoint 2024, Access 2024, Excel 2021, Word 2021, PowerPoint 2021, Access 2021, Visio Professional 2021, Visio Standard 2021, Excel 2019, Word 2019, PowerPoint 2019, Access 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, PowerPoint 2016, Access 2016, Visio Professional 2016, Visio Standard 2016
Create and add an email signature in Outlook - Microsoft Support
How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.
Applies To:
Outlook for Microsoft 365, Outlook 2024, Outlook 2021, Outlook 2019, Outlook 2016, Office for business, Office 365 Small Business, Outlook on the web, Outlook.com, Microsoft Office, New Outlook for Windows, Outlook on the web for Exchange Server 2016, Outlook on the web for Exchange Server 2019
Understanding betas, demos, and trials on Xbox | Xbox Support
In addition to selling complete games, Xbox provides different ways to try out a game before you buy it. The most common ways are betas, demos, and trials. While details vary from game to game, the FAQ below should help you understand the differences and commonalities with these offers.
Microsoft Clipchamp screen recorder - Microsoft Support
Free screen recorder with Microsoft 365 work or school account. Record your screen or create a new video in Microsoft Clipchamp, including webcam, background removal, inking, stickers, music, and text. Instantly share your video for others to view and get analytics.
Sign in using Microsoft Authenticator - Microsoft Support
Before you can use Authenticator as a way to sign in, you need to download the app and have already added Authenticator to your accounts. Starting July 2025, the autofill feature in Authenticator will stop working, and from August 2025, passwords will no longer be accessible in Authenticator.
在 Xbox One 和 Xbox Series X|S 上购买数字游戏的常见问题解答
查找有关在 Xbox 主机上购买和使用数字版游戏的常见问题的解答。
Welcome to Microsoft 365 for business - Microsoft Support
Select the App launcher towards the upper-left of the window, and then select Admin. Select Subscriptions, and then under Product Name, select the subscription you purchased to view billing information.
Xbox Update Preview Release Notes | Xbox Support
Users will see a new section under the Full Library tab in My Games and Apps called "Free with Xbox." Any previously obtained trials and demos will now appear here instead of under "Owned games."
Get started with Microsoft 365 Copilot Chat - Microsoft Support
Goes where you go : Use Copilot Chat on the web, from the Copilot desktop app, Outlook, Microsoft Teams, PowerPoint, Word, Excel, OneNote, or on your mobile device.
Join a meeting without an account in Microsoft Teams
Learn how to join a Microsoft Teams meeting if you don't have an account. Join a Teams meeting as a guest in the Windows app or on the web.
Applies To:
Microsoft Teams