Hi @Alessandro Volpato ,
If you want to remotely manage IIS with a non-administrative domain user, please add the user to IIS Manager Permissions: Double-click "IIS Manager Permissions" > Click "Allow User" > Add your domain or local user. Then go to "IIS Manager > Management Service" and enable it. After making this change, you can open IIS Manager in another server and add this server as a new connection.
Please refer to this blog: https://techcommunity.microsoft.com/t5/iis-support-blog/manage-iis-locally-with-a-non-admin-account/ba-p/1006358
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Best regards,
Yurong Dai