Outlook Web App 2010 - How to serve out to the Internet ?

I would like users to be able to access their email via OWA and IMAP/POP over the internet.  The goal is to have them connect from their home PC's and smart phones to receive this.  I would like to know how I get http://mail.domain.com to point to my email server.  My website is hosted by a 3rd party provider.  My domain name registration was provided by yet another 3rd party provided.  My Exchange 2010 server is a local machine.  OWA works internally already.  I have done nothing to configure IMAP/POP yet...  I have a UCC for mail.domain.com already.
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Glen KnightCommented:
If you want to use POP3 & IMAP & OWA you first need to configure ports 443, 110 & 143 to forward to your internal Exchange Server IP address from your router/firewall.

You will then need to enable the IMAP & POP3 services in the services snapin on the Exchange Server.

Then finally in the external DNS control panel setup an A record for the URL you want people to use and configure this to use your routers external IP address.

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In your external dns you will also need to setup a mx record that will point to your firewall and also you will need to create a policy in ur firewall for external to internal exchange server. The second thing if your users are wanting to access mail from outside then you will need to setup your externaldomainname.com/owa url in external name on your owa under client access server role and need to install http over rpc and configure  outlook anywhere from client access server.
Glen KnightCommented:
@abhijitmdp > the Mx record has nothing to do with the services requested
In the question.  You also don't need the URL to be configured in Client Access.  Outlook Anywhere is only fore remote access using Outlook.

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ND02GAuthor Commented:
I'm glad you posted that.. I was unaware that the Outlook Anyware features were seperate from enableing external OWA.  I would like them to use both.

Great comments!!
Not sure if I missed something here, but I wouldn't directly expose the ports, I would have ISA or TMG inbetween...
Glen KnightCommented:
Not everyone can afford an ISA server!  And millions of people all over the world do it without.

For many people the cost of an ISA box is cheap compared to the cost of a penetration, but as you say many just expose the ports via the firewall. In any case make sure the server is patched in a timeley manner, In the early days of Exchaange 2000 we had a missing IIS patch and our OWA servers were killed...
ND02GAuthor Commented:
After spending 2 weeks mastering my Fortigate 60 firewall, I was able to open the correct ports and enable services related to OWA, IMAP, SMTP and POP.  Thanks for the push in the right direction guys!!
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