Lifesize unit contact FQDN software.lifesize.com to fetch maintenance license.
IP address of software.lifesize.com is 18.104.22.168
Lifesize Unit send request to IP 22.214.171.124 towards port 80 TCP to fetch License.
If IP address 126.96.36.199 and TCP Port 80 is blocked on customer Firewall, Lifesize Unit won't be able to fetch Maintenance License.
1. Make sure software.lifesize.com is getting resolved on customer DNS to IP 188.8.131.52
2. On customer firewall, port 80 TCP must open bidirectionally towards IP 184.108.40.206