Encrypt email messages - Microsoft Support
Add additional privacy protection to email messages with encryption.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
Open your entire favorites bar in Microsoft Edge
How to open all of your Favorites Bar shortcuts in the Microsoft Edge web browser.
在 Microsoft Teams 中添加或邀请组织外部的人员加入聊天
借助 Teams 的外部访问，你可以添加或邀请 Teams 组织外部使用 Teams、Teams 个人使用、面向消费者的 Skype 以及Skype for Business一对一聊天的人员。
Applies To:
Microsoft Teams
SUMIF function - Microsoft Support
How to use the SUMIF function in Excel to add the values in a range that meet criteria that you specify.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
How to use two-step verification with your Microsoft account
Get answers to some basic questions about what two-step verification is, and how to set it up and use it to help keep your Microsoft account more secure.
在 Outlook 中创建联系人组 - Microsoft 支持
培训：观看并了解如何在 Outlook 中创建电子邮件联系人组，以便你可以通过电子邮件发送组，而不用单独发送电子邮件。
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
How to get support for Outlook.com - Microsoft Support
If you need help with Outlook.com, you can read our self-help content, or get support via email.
Applies To:
Outlook.com
Turn on device encryption - Microsoft Support
Learn how to turn on device encryption, or standard BitLocker encryption in Windows.
Add a dial-in number for a meeting in Microsoft Teams
When you schedule a Microsoft Teams meeting from Outlook, a dial-in number and conference ID are included automatically. If you have PSTN conferencing enabled in Teams, they are also included.
Applies To:
Microsoft Teams
Use voice typing to talk instead of type on your PC
To use voice typing, you'll need to be connected to the internet, have a working microphone, and have your cursor in a text box. Once you turn on voice typing, it will start listening automatically.