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When a user runs ArcGIS Explorer using an application configuration, the .ncfg is copied locally and cached on their computer to reduce network traffic as they work with the application. When you update a configuration using the configuration manager, the next time a user starts up Explorer, they will automatically see those changes.

This is possible because when you create a configuration .ncfg file, another file called an info-card is also created (.info.xml). This info-card is a small file that tracks when the configuration has been modified and allows ArcGIS Explorer to verify whether the .ncfg file needs to be re-copied to get the updated configuration.

If you want to send a configuration to someone, it’s not necessary to also send them the info-card. However, the info-card must be kept with the .ncfg, if you manage configurations centrally (on a shared network drive or a web server) and you want to propagate changes you make to the configuration to the users of those configurations. The application configuration manager will automatically create and update this card, but if you copy the .ncfg from a maintenance location to a shared location, it’s important to also copy the updated info-card.