Certificates SSL Symantec: GeoTrust, Thawte, RapidSSL must be re-issued and re-validated with the new DigiCert PKI backend before certain dates in 2018 to avoid any potential browser warnings.
Re-issue option is FREE! Upon re-issuance, your SSL certificate will continue to function as normal and will satisfy all browser mandates. This means you will continue benefiting from maximum validity periods, trusted browsers indicators (i.e. green EV bar, HTTPS, padlock) and avoid any unfriendly warning messages.
You will have up to 9 months to completely re-issue or renew. It all depends on the certificate's original issuance date:
1. If an SSL Certificate was issued before June 1, 2016 and expires after March 15, 2018, you have until March 15, 2018 to re-issue that SSL certificate.
2. If an SSL Certificate was issued between June 1, 2016 through December 1, 2017 and expires after September 13, 2018, you have until September 13, 2018 to re-issue that SSL certificate.