Setting up Exchange 2013 SSO

Our organization is looking to host Exchange 2013 for another organization and we need to setup SSO capabilities.

After much searching, I found that we need to setup ADFS to create a federated trust between our organization and the other organization however everywhere I look on the web shows how to connect your Active Directory to Office 365 however it doesn't show how to create an ADFS two organizations that who I already manage.

Is there a good tutorial that shows how to connect two organizations to enable SSO?
AdesteAsked:
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Adam BrownConnect With a Mentor Sr Solutions ArchitectCommented:
If you have the capability to configure a Forest trust between the other organization and yours, that would be a much simpler setup than what you want. If you do that, you can use linked mailboxes rather than mucking about with a custom ADFS setup, which is usually tricky at best.

If you can't get a forest trust going between the two environments, you would need to have an ADFS server in both environments that are configured to trust one another, then you have to set up Exchange 2013 to accept SAML tokens and ADFS authentication and impersonation. http://grumblydotnet.wordpress.com/2013/03/06/adfs-exchange-15/ might give you a little bit more information on what you need to do to integrate ADFS with Exchange 2013. Once that is set up, you would need to set up a federated trust between the ADFS server that is configured to work with Exchange 2013 and the ADFS server in the other forest, which can require some effort.
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Joseph MoodyBlogger and wearer of all hats.Commented:
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