At a customer we are using ProGet as our internal package manager server. ProGet supports a lot of different package formats including NPM and NuGet. Thanks to the usage of connectors you can even link to other package sources like the official NuGet feed or the official NPM registry.
Unfortunately after creating an NPM feed and linking it to the official NPM registry(https://registry.npmjs.org) using a connector, the connector didn’t do anything and our feed remained empty.
Turns out that a scheduled task exists that indexes the Npm registry but it only runs once a week by default.
After logging in, go to Scheduled Tasks below System settings
In the list of Scheduled Tasks you should find the ‘FullNpmConnectorIndex’ task. You can invoke it immediatelly by clicking on the ‘Play’ button at the right.