I know the answer is "yes", but I've never done it. Let me see if the 
documentation is publicly available. It may take me a day or two, I'm on the 
road travelling home after a couple weeks in a certain pacific northwest city.

-----Original Message-----
From: Steve Kradel [mailto:[email protected]] 
Sent: Friday, July 27, 2012 9:43 PM
To: MS-Exchange Admin Issues
Subject: Re: Experiences with on-premises Exchange 2010 and ADFS2

To clarify, passive federated signin to OWA works by the client starting with a 
request https://mail.foo.bar/owa/ and following a redirect over to the ADFS2 
STS, which handles authenticating the client (via one of Kerberos or 
forms-based auth), the result of which renders a new HTML form for the client 
to push its security token back to the OWA app, and I wouldn't expect RPC/HTTP 
or ActiveSync clients to be able to follow those steps out of the box.  But, 
maybe they can--is there any way to make those endpoints federation-aware?

In addition, these clients would need to have some additional hints during 
setup for identity provider-initiated sign-on, in the case where some other 
environment is responsible for creating the user's token (i.e., a pure passive 
federated signon would not know the current user's IdP).  Please let me know if 
I'm not making sense and I'll break down and make a diagram...

--Steve

On Fri, Jul 27, 2012 at 8:59 PM, Michael B. Smith <[email protected]> wrote:
> Regular outlook client would use RPC/HTTP. ActiveSync is a http-based 
> technology, so I'm not sure what you are asking about there...
>
> Is it supported "in general"? I dunno. But that's how Office 365 federation 
> works.
>
> -----Original Message-----
> From: Steve Kradel [mailto:[email protected]]
> Sent: Friday, July 27, 2012 2:16 PM
> To: MS-Exchange Admin Issues
> Subject: Experiences with on-premises Exchange 2010 and ADFS2
>
> Hi list,
>
> Having just configured Exchange 2010 SP2 with ADFS2 in a lab 
> environment (somewhat but not entirely based on Ken St. Cyr's guide @ 
> http://www.theidentityguy.com/articles/2010/10/15/access-owa-with-adfs
> .html which, although very helpful, also documents some things that 
> didn't or at least do not now work), I wanted to get the list's perspective...
>
> * Anyone doing this now to provide federated OWA services across orgs w/o 
> domain trusts?
> * If so, does Microsoft consider it a supported configuration?
> * Are users willing to accept federated OWA but not federated ActiveSync 
> access?
>
> I'm pondering how folks would access any non-HTTP-browser aspects of Exchange 
> (regular Outlook client, ActiveSync) in a federated arrangement, but it's 
> hard to escape a dependency on password sync.
> And in that case, why federate at all?
>
> --Steve
>
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