Microsoft Exchange and Active Directory Blog
The "Windows Extended Protection" security feature was introduced with a security update in August 2022 for Exchange Server 2013, 2016 and 2019 and protects against man in the middle (MitM) attacks. In small organizations where there is only a single Exchange Server, without load balancers and web application firewalls, Windows Extended Protection can be activated quite easily. In ... Read more
Microsoft has released new security updates for Exchange 2013, 2016 and 2019. A total of 4 vulnerabilities classified as important have been fixed. Details on the closed vulnerabilities can be found here: As you can see, all 4 vulnerabilities are Remote Code Execution vulnerabilities, so the updates should be installed as soon as possible. Here it goes ... Read more
Anyone who has made several Exchange servers highly available via a load balancer uses NTLM for the authentication of Outlook users by default. With a few adjustments, however, Kerberos can also be used for authentication. Compared to NTLM, Kerberos reduces the number of logins compared to the Active Directory, which can lead to better speed. Kerberos is also ... Read more
During the migration from Exchange 2016 to Exchange 2019, I encountered the problem that Outlook constantly asks for username and password. A connection via Outlook to Exchange could no longer be established as soon as the DNS entry (or the load balancer) was switched to the new Exchange 2019 servers. However, OWA and ActiveSync worked without any problems. In ... Read more
When installing new Exchange 2019 servers in an existing Exchange 2016 organization, I came across the following error. The Exchange 2019 setup asked for the organization name during the installation of the first Exchange 2019 server. The request for the organization name must not appear during the installation in an existing Exchange organization, because ... Read more
From now on you will find an overview of the current Exchange versions, updates and support periods here. As soon as new Exchange updates are released, I will try to update the page promptly. This will give you quick access to the latest download links. Of course there will still be an article about available updates, the new page is intended to ... Read more
In the last part of the Exchange 2013 to Exchange 2019 migration, the environment is cleaned up and Exchange 2013 is uninstalled. The first two articles can be found here The mailboxes and public folders have already been moved to part 2. Only a few simple steps are required to uninstall Exchange 2013 and complete the migration: Send connector ... Read more
This is the second part of the Exchange 2013 to Exchange 2019 migration. The first part can be found here: Now that the Exchange 2019 server has been configured in the first part, the actual migration can begin. Converting DNS entries Before starting the migration of data such as public folders and mailboxes, the DNS ... Read more
Microsoft would like to improve the installation of Cumulative Updates (CUs) and Security Updates (SUs) for Exchange Server and is therefore asking for feedback from administrators in an anonymous online survey. Until the end of January 2023, Exchange administrators can fill out an online form and, if desired, also provide contact details to discuss possible improvements. Since readers of my blog keep ... Read more
Support for Exchange Server 2013 ends on 11.04.2023, after this date there will be no more security updates for Exchange 2013. It is therefore high time to consider the migration from Exchange 2013 to Exchange 2019. The migration should not present any major hurdles and corresponds almost 1-to-1 to the migration from Exchange 2013 to ... Read more
