You might have the requirement to authenticate mobile devices and authorize user access to on-premises Exchange Server mailboxes using a multi-vendor strategy. This blog post focuses on the configuration of a Kemp LoadMaster located in an internal network segment. The Kemp LoadMaster ESP functionality is used to allow ActiveSync connections for members of a dedicated security group only.
This results in the following authentication and authorization endpoints:
The following diagram shows a simplified overview for mobile devices connecting to an on-premises Exchange Server. The perimeter and internal network segments are omitted for simplification reasons.
The following screenshots illustrate a working setup for a virtual service load balancing mobile device connections from MobileIron Sentry to Exchange Server. It's assumed that you've already configured the following:
The SSL Traffic is offloaded and re-encrypted as we need to authenticate the user with ESP. Ensure to select a Cipher Set that does not provide any weak or unsecure cipher suites. In this example I've selected the predefined set BestPractices.
Enable ESP to activate the ESP configuration section. The settings are as follows:
In the Real Servers section you add all member servers of your Exchange Server DAG. Ensure to use the HTTPS protocol the health checks and ensure to query the /Microsoft-Server-ActiveSync/healthcheck.htm document.
Using this configuration you've added your Kemp LoadMaster as an additional authentication endpoint to secure mobile device access to Exchange Server mailboxes.
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When migrating to new version of Exchange Servers you must move your internal SMTP relay endpoints. This can be a challeging tasks as application owners mostly ignore your requests for such changes.
You can use the information provided in the receive connector log files to identify remote clients (MTAs / MTUs) connecting to the legacy infrastructure. The assumption is that protocol logging is enabled. You can easily active protocol logging across all receive connector fo a single server using the following EMS PowerShell one-liner:
Get-ReceiveConnector -Server EX01 | Set-ReceiveConnector -ProtocolLoggingLevel Verbose
The scripts searches the log files for the connection's EHLO response which containes the remote name or remote IP-address of the system connecting to the receive connector.
You can either search
For more information read the readme.md file at Github.
You need to adjust the log file path to suit your IT infrastructure. A next releas will contain a more automatic solution.
# Search legacy Exchange servers SMTP receive log files for the last 4 days and save search results in a single CSV file
.\Get-RemoteSmtpServers.ps1 -Servers SRV01,SRV02 -LegacyExchange -AddDays -4 -ToCsv
Today is a wonderful day.
I just received the notification email that I am awarded as a MVP for Office Servers and Services.
Looking forward to interesting times with the other fellow MVPs, MCM and MCSM colleagues.
The latest downloadable build of Exchange Server 2016 Cumulative Update 9 disclosed an information that was previously shown accidently to the public by Greg T. during his breakout session BRK3249 - Modern Authentication for Exchange Server On-Premises at Microsoft Ignite 2017.
As part of the global harmonization of the product name space of the well established Outlook brand the next release of Exchange Server will be named Outlook Server 2019.
This name change was mentioned originally on this slide:
Give it a thought and you'll realize that this change makes absolute sense as different product names for the same software function distract customers and users.
Another reason for renaming Exchange Server is a new functionality for integrating personal mailbox files (PST). It was and still is a tedious task for administrators to get hold of all those PST files in use by end users. Instead of implementing a complex and data protection safe process to import PST files to the primary users mailbox the new Outlook Server 2019 offers synchronized PST folders. A functionality we've waited for for years.
Two new functions are introduced as part the new modern Outlook Server 2019
How does it work?
The following diagram illustrates the new functionality in a simple Outlook Server 2019 setup:
The following screenshot illustrates the new PSTSync folder and some sample PST file for a user with SAMAccountName JohnDoe
It's good the see that there is a future for a email server product like Exchange Server and that after so many years of cloud only an on-premises only feature got added.
Enjoy the day and Happy Easter!