However, if an external URL has been specified for the OWA vdir on the CAS servers in the AD site where the user’s mailbox is stored, the CAS server in the “wrong” AD site will initiate a redirect instead of a proxy. Let’s say the user hits https://failover.exchangeonline.dk/owa which points to another AD site than where he’s mailbox is located, he will will be presented a screen similar to the following:
Exchange 2010 SP2 will improve the redirection experience by offering a mechanism that will let the user get a cross site redirection SSO experience if FBA is enabled in both sites and CAS is providing the form. What does that mean? Well, it means that is the user will be redirected automatically (doesn’t have to click manually on a link) and not only that, he will also be allowed access to the mailbox without having to authenticate. This won't work however if the form is being generated in front of Exchange, on TMG for example.
What’s New in Microsoft Exchange Server 2010 SP2: Featuring GAL Segmentation Microsoft Exchange Server and Microsoft Office 365: How to Set Up a Hybrid Deployment
Richard Mueller edited Revision 20. Comment: Fix blank headings in HTML
Ed Price - MSFT edited Revision 15. Comment: Added TOC and tags
Arman Obosyan edited Revision 14. Comment: Add link to International Community, E14SP2 Overview
Good !