Custom updates, once created, cannot be revised or edited. Sometimes mistakes in the custom update are revealed during testing, and it would cut down on work to be able to edit the custom update instead of creating it again from new.
Comments: After reviewing how custom updates work, I don't see how this would be possible, since it involves changing the files in the package, which isn't possible with any updates using WSUSPackagePublisher.
Comments: After reviewing how custom updates work, I don't see how this would be possible, since it involves changing the files in the package, which isn't possible with any updates using WSUSPackagePublisher.