If you disable UISolutions altogether, you must re-enable UISolutions importing when you either install a new dashboard application or update an existing dashboard applications in IBM Dashboard Application Services Hub. After the dashboard application install or update is complete, the dashboard application has been launched, and you have verified that data can be displayed, then you can disable importing of the UISolutions again.
If you want to control which user can import UISolutions then be aware that new or updated dashboard applications with UISolutions will not be usable until the user specified in the portal server's environment file launches the dashboard application.
The KD8_VM_IMPORT_ID variable is optional and not set by default, which means any dashboard user that has been authenticated can trigger the request to import UISolutions when they launch the dashboard application.