发送电子邮件时，我收到 550、553 或中继禁止的错误 - Microsoft 支持
症状. 当你离开家并使用家庭电子邮件帐户发送电子邮件时，你的电子邮件可能会返回并显示 550、553 或中继禁止的错误消息。
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013
LOOKUP 函数 - Microsoft 支持
如何在 Excel 中使用 LOOKUP 函数在单个行或列中搜索，并从第二行或列中的相同位置查找值。
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
Using email in Outlook on the web - Microsoft Support
Get help with signing in, changing passwords, creating and sending mail, deleting mail, creating folders, and more in Outlook on the web.
Applies To:
Outlook.com, Outlook on the web for Exchange Server 2016
Share things with nearby devices in Windows - Microsoft Support
Learn how to share documents, links, and pictures with nearby devices using Bluetooth or Wi-Fi in Windows.
如何登录 Outlook 网页版 - Microsoft 支持
Outlook 网页版是组织使用的基于 Web 的 Outlook 版本。你需要使用工作或学校帐户登录才能访问此基于 Web 的 Outlook 版本。 你的工作或学校帐户通常由组织中的某人分配给你。
Applies To:
Office for business, Office 365 Small Business, Outlook on the web, Outlook on the web for Exchange Server 2016
打开或关闭 Windows 安全中心 - Microsoft 支持
Windows 安全中心已预安装在 Windows 10 中并可随时使用。
Track my Microsoft Rewards orders - Microsoft Support
Sign in to account.microsoft.com, then select Order History on your Rewards page.
What is a Microsoft Exchange account? - Microsoft Support
A Microsoft Exchange account is a work or school email account. The organization that gave you the Exchange email account is running a Microsoft Exchange Server, or is using Microsoft 365 which uses Exchange Server to provide email.
Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Outlook 2013, Outlook Web App for Office 365, Outlook Web App
Create an email signature from a template - Microsoft Support
Use a ready signature template from a gallery to create your email signature in Outlook.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
Connect to a VPN in Windows - Microsoft Support
Learn how to create and use a VPN connection profile on Windows for secure and private internet access.