Lifesize unit contact FQDN software.lifesize.com to fetch maintenance license.
IP address of software.lifesize.com is 184.108.40.206
Lifesize Unit send request to IP 220.127.116.11 towards port 80 TCP to fetch License.
If IP address 18.104.22.168 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 22.214.171.124
2. On customer firewall, port 80 TCP must open bidirectionally towards IP 126.96.36.199