You can delete an imported certificate when the certificate has expired or when an encrypted connection is no longer necessary.
If you obtain a certificate using a CSR created from Web Config, you cannot import a deleted certificate again. In this case, create a CSR and obtain a certificate again.
On a computer connected to the same network as the printer, open a browser and enter the printer's IP address.
You can check the printer's IP address using the following menu.
Enter the administrator password to log in as an administrator.
Select the Network Security tab.
Select one of the following.
Click Delete.
Confirm that you want to delete the certificate in the message displayed.