I have 2 domains behind the same firewall/router. Domain A and Domain B.
Domain A has a domain controller and all of the servers.
Domain B is an Exchange domain only and runs on a server for Domain A.
I need to purchase third party certificates to get rid of the obnoxious warnings you get when using a self-signed cert.
Considering I have domain A and Domain B both of which have servers (autodiscover for Exchange and other webservers/timecard servers) that need to lose the warning about the cert, what is the best option for certificate type?
The multiple Domain UCC cert (will this work for both domains and subdomains like mail.domainb.com and autodiscover.domainb.com in addition to domaina servers?)
Or do I need a wildcard certificate for each domain?