Problem issue wildcard certificate with dns validation

Help
1

Hi, I have a website on IIS with windows server 2008 r2 and with more than 100 subdomain bindings.
that is a combination of many domain and subdomain that is in my dns manager and also many subdomain that main domain are in other servers with different IP.
my questions is how issue wildcard card certificate with dns validation for subdomains that is’n in my dns manager (I Can’t access to main domain that create TXT Record for validation) ?
(I’am using win-acme v2)

Thanks in advance.

2

If you don’t own the main domain and wish to create a wildcard certificate for that domain, beside asking the client to add TXT records, there’s no other way.
You must have control to the base domain if you want to issue a wildcard certificate.

3

Many Thanks for your reply.