I have SharePoint 2010 Enterprise and Exchange server 2010 SP1 installed. I added "My Inbox" web part for each user in his "my site". The problem is when the user is opening the page; the login window prompts two times, first one for SharePoint authentication, and the second one for Exchange Authentication. Is there any way to authenticate the OWA when the user is authenticated to the SharePoint. The OWA exchange server is configured to "Integrated Windows authentication". SharePoint is configured to "Windows authentication"
Thanks in advance for your help.