If you are upgrading from a version of prior to 15, and you are using the Distribution Service with Document Distribution, new configuration steps are required. If your system is configured with the Global Client Setting Use Email Distribution Service for Document Distribution enabled, a temporary file cache must be configured and associated with the Distribution Service.
See Configuring a Temporary File Cache for more information.
Note:
When the Use Email Distribution Service for Document Distribution setting is enabled and the -STMTMAILSRVR switch is applied to the Client shortcut, the Client will not check for bounce backs.