The below article should aid you in investigating the license count:
http://www.symantec.com/docs/TECH80916
Also, please be aware that this product has long since gone EOSL. I'd recommend looking for an alternative:
http://www.symantec.com/docs/TECH89655
That said, the Knowledge Base is still available online (link below), so while you may no longer be able to get support on the product, you can still get some questions answered:
http://www.symantec.com/business/support/index?page=landing&key=51963