.Net framework update causes AAD Connect to crash or CPU goes up to 100%

A recent .Net frame work update is causing the AAD Connect server to crash or the CPU utilization goes up to 100%

Go to Task manager and check the list of processes,

If MIcrosoft.Online.Reporting.MonitoringAgent.Startup is consuming high CPU or

If you have the following update,

KB4338420

Windows Server 2008

KB4338606

Windows Server 2008 R2

KB4054542

Windows Server 2012

KB4054566

Windows Server 2012 R2

KB4054590

KB4338814

KB4338419

KB4338605

KB4345418

General

Then update your Azure AD Connect Health Agent as soon as possible to avoid or stop a major issue in your infrastructure.

Use following link to know how to update them,

https://docs.microsoft.com/en-gb/azure/active-directory/connect-health/active-directory-aadconnect-health-agent-install#download-and-install-the-azure-ad-connect-health-agent

Reference: https://support.microsoft.com/en-gb/help/4346822/high-cpu-issue-in-azure-active-directory-connect-health-for-sync

 

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