Removing download button from signing process

We need to remove the ability for users to download the signed PDF through the web interface, both via the emailed signature request and the browser based version (using host/access?sessionToken={mytoken}). We've tried to set the WithoutDocumentToolbarDownloadButton setting flag, but the button is still appearing. Here is the complete set of settings we are configuring on the package:

 .WithSettings(DocumentPackageSettingsBuilder.NewDocumentPackageSettings()
                    .WithoutDialogOnComplete()
                    .WithoutDocumentToolbarDownloadButton()
                    .WithHandOverLinkHref($"{HandoverUrl}/Application/New?applicationId={configuration.ApplicationId}&type={configuration.ApplicationType}")
                    .WithHandOverLinkText("Click here when finished")
                    .WithCeremonyLayoutSettings(CeremonyLayoutSettingsBuilder.NewCeremonyLayoutSettings()
                        .WithoutGlobalNavigation()
                        .WithoutSessionBar()
                        .WithoutProgressBar()
                        .WithoutNavigator()
                        .WithoutBreadCrumbs()
                        .WithoutGlobalConfirmButton()
                        .WithoutGlobalSaveAsLayoutButton()
                    )

Is there an additional setting we need to configure, or is this something that requires manual configuration at the account level?