Import the CA Certificate to the printer.
Enter the printer's IP address into a browser to access Web Config.
Enter the IP address of the network (standard/additional) you want to configure from a computer that is connected to the same network as the printer.
You can check the IP address of the printer from the following menu.
Settings > General Settings > Network Settings > (Standard or Additional) > Network Status > Wired LAN/Wi-Fi Status
Enter the administrator password to log in as an administrator.
Select in the following order.
Network Security tab > CA Certificate
Click Import.
Specify the CA Certificate you want to import.
Click OK.
When importing is complete, you are returned to the CA Certificate screen, and the imported CA Certificate is displayed.