Select the certificate and Delete it.
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If the firewall has a decryption policy, you cannot delete a certificate for which usage is set to Forward Trust Certificate or Forward Untrust Certificate. To change the certificate usage, see Manage Default Trusted Certificate Authorities. Select the certificate that you want to revoke, and click Revoke. The certificate will be instantly set to revoked status. No commit is required. In case a certificate expires or is about to expire, select the corresponding certificate and click Renew. Set the validity period (in days) for the certificate and click OK. Import a certificate and configure as follows:
• Browse to the certificate file. If you import a PKCS12certificate and private key, a single file contains both. If you import a PEM certificate, the file contains only the certificate.
• Select the File Format for the certificate.
• Select Private key resides on Hardware Security Module if an HSM stores the key for this certificate. For HSM details, see Device > Setup > HSM.
• Import Private Key as needed (PEM format only). If you selected PKCS12as the certificate File Format, the selected Certificate File includes the key. If you selected the PEM format, browse to the encrypted private key file (generally named *.key). For both formats, enter the Passphrase and Confirm Passphrase.When you import a certificate and select Import Private Key, select Block Private Key Export to prevent any administrators, including Superusers, from exporting the private key. To import keys for high availability (HA), click Import HA Key and Browse to specify the key file for import.To export keys for HA, click Export HA Key and specify a location to save the file. Administrative roles with a minimum of read-only access can export the managed certificate configuration table as PDF/CSV. You can apply filters to create more specific table configuration outputs for things such as audits. Only visible columns in the web interface will be exported. See Configuration Table Export.