Lifesize unit contact FQDN software.lifesize.com to fetch maintenance license.
IP address of software.lifesize.com is 220.127.116.11
Lifesize Unit send request to IP 18.104.22.168 towards port 80 TCP to fetch License.
If IP address 22.214.171.124 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 126.96.36.199
2. On customer firewall, port 80 TCP must open bidirectionally towards IP 188.8.131.52