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AADConnect still isn’t working with the latest Server 2016 patch
This report from PS:
Just wanted to let you know of another issue that seems to be biting a lot of people with the July updates.
Even with the updated patch on Server 2016 (KB4345418) is still causing an issue with AADConnect servers that triggers a 100% CPU spike on some of the Health and Reporting monitoring services, only fix at this point is to uninstall the latest update. It seems to impact at least 2012 and 2016 servers.
More information here: https://social.msdn.microsoft.com/Forums/en-US/e9b621f6-f38c-488e-8fcb-ff85d406f256/azure-ad-connect-health-sync-monitor-high-cpu-usage?forum=WindowsAzureAD
We just cancelled of our Windows patching for the month, hope MS gets this sorted out soon. What a mess.
In the same vein, Matt Wilkinson tweeted me this.
@woodyleonhard KB 4345418 is causing issues on Server 2016 RDS with a black screen upon login. Have mitigated this issue with a script to delete firewall rules that are created per user. Black screen returned with this update.
— Matt (@bigfoot780) July 18, 2018