Hi Jay
I guess the license key is not installed properly. Remove the license key from Tools-> Install options & license key.
Open add\remove programs, click on change for Symantec BE 2010.
You will get 3 options, select "Additional options" and then enter the license key and proceed with the installation.
Once the license key is installed, you will be able to see "Vmware vCenter and ESX servers" check the attached screenshots
Right click on the "Vmware vCenter and ESX servers" then select "Manage Vmware vCenter and ESX servers"