Microsoft Exchange and Active Directory Blog
I am now having problems updating to CU15 on the second Exchange 2019 CU14 server. The CU15 setup aborts in my environment on a Windows Server 2022 with January updates at step 4 of 16 with the following error: On the first server, I wasn't quite sure whether the server wasn't still ... Read more
It's been a while since I published an article here about Exchange Server and Let's Encrypt certificates. In the meantime, things have changed a bit and I'm getting a lot of requests on the topic, so I'm writing a new article. As you know, Let's Encrypt is a public certification authority, ... Read more
Microsoft released CU 14 for Exchange Server 2019 yesterday. CU 14 brings these new features: Support for TLS 1.3 was also planned, but this did not make it into CU 14. CU 14 can be downloaded here: As already mentioned, CU 14 activates the Extended ... 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
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
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
The first part of the article dealt with the installation and configuration of Apache as a reverse proxy for Exchange Server, this article deals with the installation and configuration of ModSecurity as a web application firewall for Exchange 2019. ModSecurity is an open source web application firewall that uses a corresponding set of rules to protect Exchange ... Read more
