There is a new ASA model, ASA 5505. This has several licenses: 10 users, 50 users and unlimited conections.
The question is, ?Is it possible to upgrade a 5505 10 users-license to a 50-user and/or unlimited-users?
Absolutely .. it is possible to upgrade your 10-User license to 50/unlimited user license.
Part No. for 10 to 50 user license upgrade is:
ASA5505-SW-10-50= (350 USD approx.)
Part No. for 10 to Unlimited user license upgrade is:
ASA5505-SW-10-UL= (500 USD approx.)
Please contact your reseller incase you need these licenses.
Hope that helps.