If you use Azure AD Connect to sync between Office 365 and a domain controller, then the most recent update for .net has caused an issue where the CPU usage rises to 100%.

The quick fix was to uninstall Windows updates, but now Microsoft has issued a new version of the Azure AD Connect software. This update will install quickly and other than re-entering the Office 365 admin details, the upgrade will not require any reconfiguration on the user’s part.

To install the update and fix your problem with Microsoft Azure high CPU usage, go to the below link and download it. The server will not need to be restarted after the upgrade has finished.

Note that the download should start instantly once you reach the webpage below:

https://www.microsoft.com/en-us/download/confirmation.aspx?id=47594