I have a question about what kind of public SSL certificate to buy. Let's say my company is American Widgets, Inc. I install Windows Server 2003 R2 (64-bit) and setup the "ami.local" Active Directory domain. I install Exchange 2007 to accept email for "@americanwidgets.com". All the DNS and MX stuff works - users can successfully send and receive internet email.Can I get by with self-signed certificates? I know it is better for OWA and push email to mobile devices to have a public CA certificate -if I purchase a certificate for these two functions to work better, do I need to get a UC certificate? Or can I get a cheap one (like from https://domainsforexchange.net/which is quite a bit less expensive than a UC cert)?

The best idea will be to have a wild card certificate which will be like *.americanwidgets.com. With this you dont need to but any other certificate. Raj

Thanks, RajIf American Widgets only has the one domain, "americanwidgets.com," registered, would a single public SSL cert be sufficient for things like OWA and ActiveSync? I am thinking of the $19.99 one from https://domainsforexchange.net

Yes. OWA and active sync can be taken care from one single cert.Raj

Hi,If you also plan to deploy the Outlook Anywhere, another name needs to be used: autodiscover.domain.comFor the relationship between Exchange and certificate, please refer to the below article:http://msexchangeteam.com/archive/2007/07/02/445698.aspxThanksAllen