Certificate Type For Exchange

Hello,

I am working on getting our first exchange server up and running. The server is SBS 2011 with exchange 2010. We will have mobile devices that will access exchange remotely as well as internally on our network.

Since our outside IP address will be different from our internal IP address do I need to worry about the type of SSL certificate I need to buy or will any trusted certificate work?

Also, is there a certain provider that will provide the best compatibility across platforms?

Thank you in advance.
Pawel_KowalskiAsked:
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Alan HardistyCo-OwnerCommented:
To make Exchange 2010 happy which comes with SBS 2011, you would be best advised to buy a SAN / UCC certificate (multi-name) with a minimum of 5 names including:

remote.externaldomain.com (or whatever you configure SBS to use)
autodiscover.externaldomain.com
servername.internaldomain.local
servername
sites

GoDaddy are about the cheapest place to buy but a GoDaddy Reseller account is cheaper still.
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Pawel_KowalskiAuthor Commented:
Thank you! Would I map the external IP to the .com and the internal IP to all others? Or is there a way to have 2 IPs for each domain on the certificate?
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Alan HardistyCo-OwnerCommented:
There is no mapping of IP's.  You need to make sure that your MX record points to your Public IP Address and that port 25 is open to receive emails, port 443 is open for HTTPS which is used by Mobile Devices to connect, port 987 for Sharepoint if you use it, port 80 if you host a website and port 4125 for Remote Web Workplace.

What are you thinking you have to do with IP's / domain names?
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Pawel_KowalskiAuthor Commented:
I thought that you had to have a dedicated IP address mapped to the SSL certificate. Am I wrong on that assumption? Thanks again
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Alan HardistyCo-OwnerCommented:
As long as you have a Fixed IP Address for your server and the right DNS records pointing to the Fixed IP Address you will be fine.  There is no association between an SSL cert and an IP address - the cert only has Fully Qualified Domain Names in it and those names need to either resolve externally to your Public IP address or internally to your server.
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Pawel_KowalskiAuthor Commented:
Great to know. Thank you!
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