Windows Server 2016/2019 AD LDS installation with a specific configuration set level
With the release of Windows Server 2025, AD LDS configuration sets are required to have a functional level of Windows Server 2016 or greater. Unfortunately, there is no documentation on how to create a configuration set on Server 2016/2019 with a specific level or how to raise the level of an existing set. The only article with relevant information says that manually updating the msDS-Behavior-Version attribute of the Partitions container to 7 will not work. LDS service startup fails - Windows Server | Microsoft Learn. If I execute the C:\windows\adam\adaminstall.exe /?:answer command, I see that a parameter named /ConfigurationSetLevel exists and its default value is 7, However, when I create a new AD LDS configuration set via the wizard, it is created at the level of 2 by default. If I specify ConfigurationSetLevel=7 in the /answer: file and pass it to adaminstall.exe, the installation fails without any errors. Notably, any ConfigurationSetLevel from 2 to 5 works fine using this method. It seems that it is impossible to create an AD LDS configuration set on Server 2016/2019 and add a replica from Server 2025 to it. Is this correct?Active Directory Web Services Event 1202
Hey there! Josh Mora here, with a brief post on an issue I recently had and wanted to make public, in hopes this will help those that run into this issue, and in addition, provide some helpful logging information that can be useful for any ADWS issues you might come across.
