Outlook Web Access 2010 using Windows Integrated Authentication - Enterprise Vault

Here is something I ran into that was interesting with Exchange 2010 and Enteprise Vault OWA Extensions.

Hopefully it can help someone:

Technology Grump: Windows Integrated Authtentication for OWA Enterprise Vault Extensions

It involves setting up constrained delegation for the CAS server roles to authorize them access mailboxes of the users in a load balanced CAS Array situation, even if all servers are CAS/Mailbox/Hub Transport roles.

Also a tidbit on when you could use Windows Integrated Authentication to remove that excess logon for internal users.