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This option enables you to upload an .extarchive file containing the extension you want to add to CAST Extend local server. See Update CAST Extend local server with new content for more information:

When an .extarchive is uploaded, the packages are stored by default in:

Code Block


By default, the Synchronize action is performed immediately after installation (once the CAST Extend user credentials have been input) and then automatically every two hours (at the time the server is first started), Monday to Friday: CAST Extend local server will contact CAST Extend and perform a manifest synchronization - the manifest is a list of all extensions that are currently available in CAST Extend. 

Manually actioning a synchronization

If required (for example a new extension has been released which is required immediately), you can manually perform the action using this Synchronize button. The button will force CAST Extend local server to contact CAST Extend and perform a manifest synchronization. When the button is pressed, the synchronize action starts (1):

Clicking the icon marked (2) above will show the progress of the synchronization process:

Cancelling an in-progress synchronization (≥ 2.0.0-funcrel)

To cancel an in-progress synchronization, use the cancel button (2) as shown below. When a synchronization is cancelled, anything that has already been synchronized will remain, i.e. a rollback is not actioned.

Manually configuring the synchronize schedule

As mentioned above, the synchronize action is performed automatically every two hours, Monday to Friday. If you would like to change this schedule (for example to include weekends or to reduce the frequency), see Advanced configuration of CAST Extend local server.

Blacklisting extension download

To blacklist a specific extension and prevent its download, see Advanced configuration of CAST Extend local server.