Alibaba Cloud SSL Certificates Service allows you to renew a certificate before it expires. The remaining validity period of the original certificate is added to the validity period of the renewed certificate. To comply with the requirements of CAs, SSL Certificates Service does not support auto-renewal. You must manually renew certificates.
A renewed certificate must be consistent with the original certificate in terms of the certificate type, brand, and enterprise information. Otherwise, the renewed certificate is identified as a purchased certificate. In this case, the remaining validity period of the original certificate is not added.
You must renew a certificate in the SSL Certificates Service console. For more information, see Renewal upon expiration.