Because the Self-signed Certificate is issued by the printer, you can update it when it has expired or when the content described changes.
A self-signed certificate for SSL/TLS and one for S/MIME are issued separately. Update each certificate as necessary.
When you update a self-signed certificate by selecting the Network Security tab > S/MIME > Client Certificate, you cannot change Sender's Email Address on the Network tab > Email Server > Basic. If you want to change Sender's Email Address, change all signature settings to Do not add signature by selecting the Network Security tab > S/MIME > Basic, and then delete the self-signed certificate for S/MIME.
Access Web Config, and then select the Network Security tab. Next, select SSL/TLS > Certificate or S/MIME > Client Certificate.
Click Update.
Enter Common Name.
You can enter up to 5 IPv4 addresses, IPv6 addresses, host names, FQDNs between 1 to 128 characters and separating them with commas. The first parameter is stored to the common name, and the others are stored to the alias field for the subject of the certificate.
Example:
Printer's IP address : 192.0.2.123, Printer name : EPSONA1B2C3
Common name : EPSONA1B2C3,EPSONA1B2C3.local,192.0.2.123
Specify a validity period for the certificate.
Click Next.
A confirmation message is displayed.
Click OK.
The printer is updated.
You can check the certificate information by clicking Confirm on the Network Security tab > SSL/TLS > Certificate > Self-signed Certificate or S/MIME > Client Certificate > Self-signed Certificate.