Hi,
Here is a listing of the ASA5505 Licenses (also containing the one you mention)
As you can see, it will give you Unlimited User License and therefore you wont be limited to a specific number of users anymore.
Table 1. Recommended Cisco ASA 5500 Series Business Edition Solutions
Cisco ASA 5505 Solution Description | Firewall/VPN Performance | Part Number |
Cisco ASA 5505 10-user bundle Includes 10-user license, 8-port Fast Ethernet switch, stateful firewall, 10 IPsec VPN peers, 2 SSL VPN peers, 3DES/AES license, and 1 expansion slot | 150 Mbps/100 Mbps | ASA5505-BUN-K9 |
Cisco ASA 5505 50-user bundle Includes 50-user license, 8-port Fast Ethernet switch, stateful firewall, 10 IPsec VPN peers, 2 SSL VPN peers, 3DES/AES license, and 1 expansion slot | 150 Mbps/100 Mbps | ASA5505-50-BUN-K9 |
Cisco ASA 5505 unlimited user bundle Includes unlimited user license, 8-port Fast Ethernet switch, stateful firewall, 10 IPsec VPN peers, 2 SSL VPN peers, 3DES/AES license, and 1 expansion slot | 150 Mbps/100 Mbps | ASA5505-UL-BUN-K9 |
Cisco ASA 5505 Security Plus bundle Includes Cisco ASA 5505, unlimited users, 8-port Fast Ethernet switch, stateful firewall, 25 IPsec VPN peers, 2 SSL VPN peers, stateless Active/Standby high availability, dual ISP support, DMZ support, 3DES/AES license, and 1 expansion slot | 150 Mbps/100 Mbps | ASA5505-SEC-BUN |
Actual document link:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/prod_brochure0900aecd80402e36.html
Also notice regarding the DHCP. DHCP Pools max size is a /24 network and you cant configure more than 1 Pool per interface of ASA.
- Jouni
