Server 2008R2 machines not onboarding in M365 Defender portal

Christian Magno 0 Reputation points

I am in the process of onboarding a customer's servers to Microsoft 365 Defender. They still have a fair amount of 2008R2 machines which need to be onboarded by connecting the Microsoft Monitoring Agent to an OMS workspace. This works fine for most machines, but 10 machines refuse to onboard. I've already checked the following:

  • Machines are running the latest MMA
  • Machines are patched and up to date (for 2008R2)
  • Machines can connect correctly to the OMS workspace
  • Machines connect directly (no proxy)
  • Machines successfully pass the connectivity test to all Azure hosts I'm currently out of ideas, especially since 20 other machines have been onboarded without issues.
Microsoft 365
Microsoft 365
Formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line.
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Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Rohit Kumar Sinha 1,321 Reputation points

    Hi Christian , There are a few KBs that needs to be installed on Win 2008R2 , please check below. User's image

    You can refer to the below URL for more clarity and check if this helps. If the above is useful , please mark this as Accept Answer