ATPHandler: Unexpected ConfigurationType, error when trying to onboard to Defender ATP using MECM
I am trying to onboard machines using the Microsoft Defender ATP Policies deployment. I specified the onboarding file which I downloaded from Defender ATP, and I also specified the workspace ID an workspace key. I defined both the file and key because I am targeting both up level and down level clients in my collection. In the ATPHandler.log file I see the following error messages: ATPHandler: Unexpected ConfigurationType, ATPHandler 16-12-2020 20:55:35 3552 (0x0DE0) ATPHandler: Failure in CATPHandler::HandleUIPolicy: 0x80070057 ATPHandler 16-12-2020 20:55:35 3552 (0x0DE0) This is on a down level client (Windows Server 2012 R2). I followed the recommended steps from this manual: https://docs.microsoft.com/en-us/mem/configmgr/protect/deploy-use/defender-advanced-threat-protection?redirectedfrom=MSDN Edit: on a 2016 machine I get the same error message. The site version is: 5.00.9012.1000 The client version is: 5.00.9012.1052 So far I tried to recreate the entire policy, I even did a fresh download of the onboarding file. What can I do to further troubleshoot this? There is not much information to be found about this error message. I found one forum post here, but that does not provide a solution for me.