After upgrading the Solaris operating system, you should perform steps 6, 7, and 9 of the post-installation tasks as described in Section 1.6; i.e., remove sendmail files and create PMDF symbolic links in their place, replace sendmail with /pmdf/bin/sendmail and kill off any non-PMDF sendmail processes, and start the PMDF Job Controller and PMDF Service Dispatcher.