Hi there,
You may want to clarify the licensing issue with our customer care department and request them to re-issue another license with messaging functionality. Please click on the link below for their contact phone numbers according to the region:
http://www.symantec.com/business/support/assistance_care.jsp
Nevertheless, there is a way to pull the license information from the installed PGP Desktop. You may want to check it in the PGPprefs.xml file. The license key is in general there but it is base64 encoded. You may want to try with the linux command line to try to convert it to the ascii.
If you have further question, please let us know.
Best Regards,
Bipin