Outlook 2010 Autodiscover Prompt For Password

I received complain from one of my customer saying that user is getting prompt for password when the open the outlook client.

There is a box pop up for username and password,displaying "Connect to Autodiscover.abc.com"

Although he select "remember my password", the box will prompt again when he close and re-open the outlook client.

I type https:\\server\autodiscover\autodiscover.xml and make sure that it is valid, I also make sure the internal and external url of autodiscover is correct by running commandget-autodiscoverinternalurl and get-rutodiscoverexternalurl .


At the end,I found out that it is cause by the proxy settings. After adding the CAS array url into bypass proxy setting, the problem resolved.


I update the GPO and push it to all the client so that they can get rid of it.