Hello, I use Exchange 2007 and I lately noticed that many user got the prompt for credentials when they open or use their Oultook 2007 or 2010. As it used to work properly and nothing has changed (Thrid party certificate was renewed in January). I started to check the Test-OutlookWebServices and the AutodiscoverVirtualDirectory. I only notice that when I type the https://autodiscover.company.com/Autodiscover/Autodiscover.xml in a browser from the hubcas or when I am connected on the domain that I got the prompt for credential. Also the AD team informed me that the installed a new Domain controler with Windows server 2008. I would think that there is something missed but I would need your experience to help me figure out what. Is there anything I should do check on the exchange server? or the ad team on the DC? many thanks, Graig

Note that you've posted in the Exchange 2013 forum. The Exchange 2007 forums are here: http://social.technet.microsoft.com/Forums/en-US/category/exchangeserverlegacy Did you configure IIS for URL simplification and HTTP redirection? If so, take a look at this article and be sure you have everything properly configured. http://briandesmond.com/blog/redirecting-owa-urls-in-exchange-2010/ Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Sorry and Thanks Ed. I open a new thread on the Exchange 2007 and will check your link. Graig