Organisation validated SSL certificates are available in three types. The OrganisationSSL to secure one (sub)domain name. The OrganisationSSL SAN to secure several (sub)domain names including local hostnames and the OrganisationSSL Wildcard certificare to secure onde domain and an unlimited number of sub domain names.
Secure 1 domain name, for example:
www.yourdomain.nl
yourdomain.nl
Secure several (sub) domain names, for example:
mail.yourdomain.nl
autodiscover.yourdomain.nl
exchange02.yourdomain.loc
exchange02
Secure all sub domains for your domain name (*), for example:
*.yourdomain.nl