Access phone's web interface:
1. On your phone, press the Home key.
2. Go to Settings > Status > Network > TCP/IP Parameters > IPv4 addr to get the phone's IP address.
3. In a web browser, enter https:// followed by the phone's IP address.
4. Log in to the web interface of the phone. If the web browser shows a certificate error, ignore it and continue to access the page.
Configure provisioning server:
1. In the web interface, go to Settings > Provisioning Server.
2. In the Server Type drop-down menu, select HTTPS.
3. In the Server Address field, enter https://provpp.zoom.us/api/v2/pbx/provisioning/Polycom/vvx450.
4. Ensure that the Server User and Server Password fields are blank.
5. Go to DHCP menu. In the Boot Server drop-down menu, select Static.
6. Scroll down to the bottom of the page and click Save. Your phone will reboot to complete configuration.