If you run into an issue during the upgrade of a security server where the option to prepare for upgrade or reinstallation is greyed out in the View admin page or you receive an error during the security server upgrade similar to:
“Unable to connect to the server <ServerName> on TCP port 8009. Please check that the specified Connection Server is running and that this TCP port is not being blocked by a firewall”
On both the security server and the paired connection server, open the Windows Firewall with Advanced Security MMC console and click on Connection Security Rules and delete the VMware View Security Server QM Pairing line.
Once this has been deleted from both servers, you should be able to set your Security Server Pairing Password and pair the servers up again.