We want to replace an expired certificate for a subdomain hosted in its own server, for example:
department.area.city.gov
We just have control over that server and subdomain. Because of security reasons (changed recently), there are no *@city.gov email accounts (usual way for verification, e.g.,[email protected]) and there is no way we can persuade them to add files or modify DNS settings in order to verify (COMODO alternatives).
How can this problem be solved? Anyone had experience with such cases?