@Bruno Ramos de Matos
Thanks for your posting on Q&A.
Please consider enabling the below policy to prevent the clients from checking for updates from the Internet:
Hope the above will be helpful.
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Hi @Rita Hu -MSFT ,
Thanks, that looks straight forward enough.
I have just tested it and can confirm it has removed the option for checking for updates online from Microsoft Update.
I have also been able to install and update apps after following your advice.
Would there be any possible impacts that you may be aware from configuring this setting for turning off internet access for all Windows Update features? Just want to make this final check before I go ahead and verify your answer as the solution. :)
Perhaps we are looking for this:
Review the above screenshot and confirm whether it help or not.