Microsoft Exchange and Active Directory Blog
It can happen that the Exchange Health Checker displays the following error in the report: This error is displayed for virtualized Exchange Servers where the "Dynamic Memory" feature is enabled for the VM. Dynamic Memory is not supported for Exchange Server, therefore the Exchange Health Checker shows this error. This error can occur with Exchange Servers ... Read more
Since the Exchange Server April 2024 Hotfix Update, Exchange Server 2019 also supports ECC (Elliptic Curve Cryptography) certificates. However, there are a few things to bear in mind when using ECC certificates. In the following article, we take a look at what you need to consider. What are ECC certificates ECC certificates (Elliptic Curve Cryptography) are certificates that are based on ... Read more
The validity of certificates can be checked either via OCSP (Online Certificate Status Protocol) or classically via a revocation list (CRL). The basic revocation list of a Microsoft Windows certification authority is valid for 7 days by default. In some cases, this is too long, as a certificate may still be valid after revocation. Read more
The security updates that caused problems with transport rules were released again today. The new updates have the suffix "v2" and are intended to fix the problems. Microsoft writes the following: If the original version of the update is already installed, the V2 update must now be installed to resolve the issues. Even if the original update ... Read more
Windows Server 2025 offers new features for Active Directory (AD DS) and Active Directory Lightweight Domain Services (AD LDS) for the first time in a long time. With the new features, Active Directory scales better even in very large environments and brings additional improvements for security and stability. Optional feature for 32k database page size Since the introduction of Active Directory ... Read more
Domain Controllers under Windows Server 2025 currently have the problem that an incorrect network profile is loaded. After restarting the server, the network profile "Public" is loaded, although it is a domain controller. Here is a screenshot from the GUI directly after starting the operating system And here is a screenshot from the PowerShell: ... Read more
It can happen that the Exchange Health Checker displays the following error in the report: Actually, this is not really an error. A message as a warning would probably have sufficed. The error merely indicates that the size of the event log is too small (the application log is mentioned in the screenshot above). A ... Read more
The security updates for Exchange Server 2016 and 2019, which were released on 12.11.2024, cause problems with the transport rules. In the Exchange Team Blog and in various forums, users are reporting that the transport rules of the Exchange Server no longer work or only work shortly after restarting the Exchange Transport Services. When transport rules are used ... Read more
Microsoft has released new security updates for Exchange Server 2016 and 2019. Click here to download directly: The security update also includes new features: Improvements to the integration of AMSI in Exchange Server As of the release of the November 2024 security update, the ability of products that use Exchange Server AMSI integration has been enhanced to perform additional tasks ... Read more
The new Windows Server 2025 brings some new features for the Active Directory and also makes the upgrade particularly easy. An inplace upgrade to Windows Server 2025 is possible from Windows Server 2012 R2 without an intermediate step. In principle, only the Server 2025 ISO needs to be mounted and it can be upgraded directly. In ... Read more
