Windows Server Edge

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Edge Transport servers handle all inbound and outbound Internet mail flow by providing mail relay and smart host services for your Exchange organization. Agents running on the Edge Transport server provide additional layers of message protection and security. These agents provide protection against spam and apply mail flow rules (also known as transport rules) to control mail flow. All of these features work together to help minimize the exposure of your internal Exchange to threats on the Internet.

A blade-based server node that integrates servers, storage, networking and management into a single chassis designed for maximum density, efficiency and manageability. M640 Two-Socket Server Module (Intel). Devices with Windows installations created from custom offline media or custom ISO image might have Microsoft Edge Legacy removed by this update, but not automatically replaced by the new Microsoft Edge. This issue is only encountered when custom offline media or ISO images are created by slipstreaming this update into the image without having first installed the standalone Servicing Stack.

Because the Edge Transport server is installed in the perimeter network, it's never a member of your organization's internal Active Directory forest and doesn't have access to Active Directory information. However, the Edge Transport server requires data that resides in Active Directory: for example, connector information for mail flow and recipient information for antispam recipient lookup tasks. This data is synchronized to the Edge Transport server by the Microsoft Exchange EdgeSync service (EdgeSync). EdgeSync is a collection of processes run on an Exchange 2016 or Exchange 2019 Mailbox server to establish one-way replication of recipient and configuration information from Active Directory to the Active Directory Lightweight Directory Services (AD LDS) instance on the Edge Transport server. EdgeSync copies only the information that's required for the Edge Transport server to perform antispam configuration tasks and to enable end-to-end mail flow. EdgeSync performs scheduled updates so the information in AD LDS remains current. For more information about Edge Subscriptions and EdgeSync, see Edge Subscriptions.

You can install more than one Edge Transport server in the perimeter network. Deploying more than one Edge Transport server provides redundancy and failover capabilities for your inbound message flow. You can load balance the SMTP traffic to your organization among Edge Transport servers by defining more than one MX record with the same priority value for your mail domain. You can achieve consistency in the configuration among multiple Edge Transport servers by using cloned configuration scripts.

The Edge Transport server role lets you manage the following message-processing scenarios.

Internet mail flow

Edge Transport servers accept messages coming into the Exchange organization from the Internet. After the messages are processed by the Edge Transport server, mail is routed to an internal Exchange Mailbox server; first to the Front End Transport service, and then to the Transport service.

All messages sent to the Internet from inside the organization are routed to Edge Transport servers after the messages are processed by the Transport service on the Exchange Mailbox server. You can configure the Edge Transport server to use DNS to resolve MX resource records for external SMTP domains, or you can configure the Edge Transport server to forward messages to a smart host for DNS resolution.

Antispam protection

In Exchange Server, antispam features provide services to block unsolicited commercial email (spam) at the network perimeter.

Spammers use a variety of techniques to send spam into your organization. Edge Transport servers help prevent users from ever receiving spam by providing a collection of agents that work together to provide different layers of spam filtering and protection. Establishing tarpitting intervals on connectors makes email harvesting attempts ineffective.

Mail flow rules on Edge Transport servers

Mail flow rules on Edge Transport servers are used to control the flow of messages sent to or received from the internet. Mail flow rules are configured on each Edge Transport server to help protect corporate network resources and data by applying an action to messages meeting specified conditions. Mail flow rule conditions are based on data, such as specific words or text patterns in the message subject, body, header, or from address; the spam confidence level (SCL); or the attachment type. Actions determine how the message is processed when a specified condition is true. Possible actions include quarantining a message, dropping or rejecting a message, appending additional recipients, or logging an event. Optional exceptions exempt particular messages from having an action applied.

Address rewriting

Address rewriting presents a consistent email address appearance to external recipients. You configure address rewriting on Edge Transport servers to modify the SMTP addresses on inbound and outbound messages. Address rewriting is especially useful for newly merged organizations that want to present a consistent email address appearance.

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This article describes the supported operating systems that apply to Microsoft Edge.

Note

This article applies to the Microsoft Edge versions 77 and higher for the desktop.

Supported Operating Systems for Microsoft Edge

Note

Product functionality and feature availability may vary on older operating systems. To ensure that Microsoft Edge installs correctly, use the latest version of any operating system specified below. This guidance includes the latest cumulative update, as applicable.

Microsoft Edge follows the Modern Lifecycle Policy and is supported on the following operating systems.

Windows Client

Windows 7 **
Windows 8.1
Windows 10 SAC 1709 and later ***
Windows 10 Enterprise 2015 LTSC
Windows 10 Enterprise 2016 LTSC
Windows 10 Enterprise 2019 LTSC
Windows 10 Enterprise multi-session
Windows 10 IoT Enterprise SAC ****
Windows 10 IoT Enterprise 2019 LTSC ****

Windows Server

Windows Server 2008 R2 **
Windows Server 2012
Windows Server 2012 R2
Windows Server 2016 (LTSC)
Windows Server 2019 (LTSC)
Windows Server (SAC)

Important

** We will continue to support Microsoft Edge on Windows 7 and Windows Server 2008 R2 until January 15, 2022. These operating systems are out of support and Microsoft recommends you move to a supported operating system such as Windows 10. While Microsoft Edge helps keep you more secure on the web, your PC may still be vulnerable to security risks. In order for IE mode to be supported on these operating systems the devices will need to have the Extended Security Updates for Windows 7. Without the Windows 7 Extended Security updates Internet Explorer functionality will be vulnerable to security risks. Additionally, IE mode functionality may cease to work without the continued servicing through the extended security updates.

*** In the same fashion as above, for Windows 10 SAC releases that are out of support but Microsoft Edge is supported it is recommended to upgrade to a supported Win10 SAC release as soon as possible to remain secure. Microsoft Edge being supported in this state should be considered a temporary bridge to getting to a supported OS state.

**** The Microsoft Edge OPK is available on MOO for IoT OEMs to preinstall and distribute as part of their Windows 10 IoT Enterprise based solution.

macOS

Sierra (10.12) and later

iOS

Microsoft Edge for iPad® and iPhone® requires iOS 11.0 or later. Microsoft Edge for iPad Pro™ requires iOS 11.0 or later. Microsoft Edge is supported on the two most recent versions of iOS. When a new version of iOS is released, the Microsoft Edge Operating System requirement becomes the then-current two most recent versions: the new version of iOS and the previous version.

Android

Microsoft Edge for Android can be installed on tablets and phones that meet the following criteria: devices running Android KitKat 4.4 or later with an ARM-based processor.

Apple Silicon Macs

Microsoft Edge native support as of Stable version 88 for Apple Silicon Macs.

Chromebooks

Microsoft Edge does not support Chromebooks.

Windows Server 2019 Edge

Recent changes