A subscribed content library can synchronize its content with other content libraries. The idea is that you maintain only one content library (for example, in HQ) and all subscribed libraries will synchronize their content from the HQ without additional manual operations:

1. To subscribe to a content library, you need to have at least one content library defined on another vCenter server with the Published Externally flag set to Yes, as seen in the following screenshot:

2. During the configuration of a subscribed library, you need the Subscription URL. You can quickly click the COPY LINK button to get the URL, or you can click on Edit Settings to access the information:

It is possible to have multiple Local and Subscribed Content Libraries in a single vCenter Server.

To create a new subscribed content library, perform the following tasks:

1. In a different vCenter server (vCenter does not need to be part of the Linked-Mode), switch to Content Libraries and create a new content library.
2. Provide a name for the new content library and click Next.
3. Select the subscribed content library option, provide a subscription URL, and provide authentication credentials if the authentication is configured. You have the option to either download all content automatically, or only download the metadata and download the item from the source content library once the item is accessed.
4. The files will be stored on a datastore, so select which datastore will back up the content library.
5. Confirm the configuration on the review screen:

Once the content library is created, it will synchronize automatically from the source content library, and once the synchronization is complete, you will see the same content in the subscribed content library as in the original one:

If you need to manually sync the content library (automatic synchronization is enabled by default) you can invoke manual synchronization from the Actions menu.