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Publishing Exchange Server 2010 with Forefront UAG and TMG

The_Exchange_Team's avatar
The_Exchange_Team
Platinum Contributor
Jul 16, 2010

Since joining the Exchange Customer Experience team a few months ago, a question I'm commonly asked (aside from “When are you taking over the storage calculator from Ross? He’s a busy chap and as the new guy on the team you should help him out so he can take a break now and then.” – these comments added by Ross as a pre-condition to publishing this) is how to increase the security of access to Exchange from the Internet. I’m asked this mainly because I have a particular interest in client access and security aspects of Exchange, and have on many occasions come up against security folks who want to take all the fun out of deploying Exchange, or to put it their way, make things more “secure”.

Well, I’ve gone and written a whitepaper that walks you through the entire process of using either Forefront Threat Management Gateway (TMG) or Unified Access Gateway (UAG) to publish Exchange 2010. It starts by helping you decide whether to use Forefront TMG or UAG, makes sure you get the terminology understood, then provides step-by-step instructions to configuring the environment. It also covers migration considerations, troubleshooting steps and even how to publish ECP, but not Outlook Web App. And if you don’t know why you might want to do that, it even explains that!

I have a few more of these guides underway, and so we will also be publishing guides on how to enable Outlook Anywhere with NTLM through TMG/ UAG, while still benefiting from pre-authentication, how to do certificate-based authentication for mobile devices, and one other paper I’m keeping the subject of under wraps for now, but it promises to be an interesting way to secure remote access, that many of our customers will find interesting.

The guides are a little too detailed to publish as regular pages on TechNet, so we’ll be providing them as downloadable whitepapers. The first of which, “White Paper – Publishing Exchange Server 2010 with Forefront Unified Access Gateway 2010 and Forefront Threat Management Gateway 2010 is available.

Greg Taylor

Updated Jul 01, 2019
Version 2.0

36 Comments

  • Anonymous's avatar
    Anonymous
    Hi Greg,
    Great stuff !, i think thus that "Provide certificate-based authentication for Exchange ActiveSync, Outlook Web App, and ECP" in the table should show that it's obviously available with UAG too....
  • Anonymous's avatar
    Anonymous
    @Jonas - glad you liked it first off.

    With regard to Basic vs NTLM from a user perspective, Basic, with any version of Outlook prior to 2010, results in a pop up dialog asking for creds. Outlook 2010 makes the 'save this password' actually work, so in an Outlook 2010 world, Basic can mean no need to authenticate every time you open/reconnect, but in all earlier versions, you will have to enter creds every time.

    NTLM, when used by a client that is domain joined and logged in with cached creds, results in the client simply sending the cached in creds to the server, resulting in what looks like a pretty seamless single sign on experience. However, if you want to do pre-authentication at something like TMG, and not let the traffic go all the way to CAS, you need to configure TMG for this. That's in the future Whitepaper.

    NTLM on a machine without cached creds will again result in a pop up - or... there is a way to avoid that, but again for that you'll have to read the upcoming whitepaper on how to get OA NTLM to work through TMG... yes, it's a teaser... Reason is, the steps to get OA/NTLM to work, with pre-auth are complex, and I'd rather I give you all the steps you need than ask you to join the dots. It won't be long before it's ready.
  • Anonymous's avatar
    Anonymous
    Excellent article! When running Outlook Anywhere, you should really try to explain the difference between Basic and NTLM. Not mainly the technical aspects of the difference. I've read many explanations on that, but from the user's perspective - what's the difference for choosing one over the other? For example, why are there two choices at all if one is beneficial over the other?
  • Anonymous's avatar
    Anonymous
    Great acticle to use on monday at a client who want's E2010 and TMG2010 in production
  • Anonymous's avatar
    Anonymous
    Great, there goes my weekend.  Thanks for the articles!