So, you’ve gotten an SSL/TLS certificate and validated your base domain, but now you need certificates to cover additional subdomains. Can you re-use your previous validation, or do you need to repeat the process?
- If you have validated
example.com, you do not need to go through domain validation for a new CSR forinfo.example.com(or any other subdomain ofexample.com) unless the original validation has expired. (Note: DV is valid for 825 days between validations.) - If you are adding
info.example.comto the CSR of a previously-issued certificate coveringexample.com(for example, when reprocessing a multi-domain certificate), you do not need to go through domain validation forinfo.example.comunless the original validation has expired. - However, in both of the above cases, if your initial validation was for
info.example.com, you do need to go through domain validation forexample.comorwww.example.com(but not forwww.info.example.com).
Note: If you add a new domain name when reprocessing a multi-domain certificate and wish to use the CNAME or file lookup validation method, you will need to create a new CNAME or file for validation. These DV methods both require a unique value that is incorporated into the CNAME or file.
Thank you for choosing SSL.com! If you have any questions, please contact us by email at Support@SSL.com, call 1-877-SSL-SECURE, or just click the chat link at the bottom right of this page. You can also find answers to many common support questions in our knowledgebase.