Prevent Plesk's background services to communicate to services on the internet on servers that are placed on a private network/intranet .
Create a feature that enables switch off background services on Plesk like Extension catalog, Application (APS) catalog, KA service to trying to communicate with external Plesk's service servers on the internet.
It will be usefull on Plesk servers that will be placed on internal/intranet networks were access to the internet is not possible, since requests to external services makes Plesk UI slow as the connection to external services fails.
Thank you for your input. We will consider this functionality in upcoming releases if it is popular. Everyone, please continue voting for this feature if you consider it important.