Hello, We have2 Exchange 2007 CAS servers and 2007 MB serverand a Exchange 2003 FE and BE server. The CAS serversif access directly are able to properly proxy back to the Exchange 2003 mailboxes and display the itemsin the mailbox. Wealso have deployed a F5 LTM load balancer and if we try to access the CAS servers via the VIP on the LTM to the /exchange site loads but the inbox contents just show loading. If we access mailbozeson the exchange 2007 enviroment all displays correctly.Has anyone else expienced this issue? Thanks, Mike