As with my previous blog post where we upgraded to CU2, in this example we will run the same command from an elevated command prompt to update to CU3.

As we are upgrading from CU2, we do not need to run the PrepareAD command, if you want to read more about CU3, head over to the Microsoft Office Page.

Launch the command prompt elevated and navigate to the ISO you mounted or extracted and run the following command:

  • .\Setup.exe /Mode:Upgrade /IAcceptExchangeServerLicenseTerms

Upgrade completed without error. You now need to reboot your server.

Hope it helps.

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