Hello I use an SBS 2011 server and Exchange 2010. My clients are on thunderbirds, mail (mac), and Outlook 2007. Everything works except for a 1 computer using outlook 2007 ... When I create the mail account and runOutlook, it asks for the authentication exchange account created earlier. I enter the correct name and password, but the window opens again and asks me the same thing. The DNS configuration of my computer is good. any idea? Sincerely, Jrmy

This is a English Forum, post in English or post in the local forum. Sukh

This is a English Forum, post in English or post in the local forum. Sukh

Hello, Since the issue only occurs to one client, I think the cause is more related to the client issues. I suggest we start troubleshooting the issue by consulting our Outlook forum: http://social.technet.microsoft.com/Forums/en/outlook/threads Thanks, Simon

Probleme solved. I update outlook and force manualy the authentication