Thanks lee for your response. I checked my mails today & was happy to see a response. In fact we had three types of auth pop up issue. One was related to AD site similar to what the link says, second is related to OAB (auth pops up whenever user do send/receive) and third is related to principle name( was changing msstd setting in rpc over https outlook profile automatically). AD site issue was solved by associating CAS with respective AD only. OAB issue was resolved by setting the right authentication using ADSIEDIT and the third was solved by setting the certificate principle name to “Not set” in ADSIEDIT, we have four URL for four different regions, hence setting it to “not set” was a better option. . Now all the three auth pop issues is resolved and I am so happy. It took more than 25 days to resolve the issue. Regards Praveen R --- On Fri, 3/20/09, Lee Ann Swanson <swanson@xxxxxxxxxx> wrote: From: Lee Ann Swanson <swanson@xxxxxxxxxx> Subject: [ExchangeList] Re: sudden Authntication pop for outlook 2007 To: exchangelist@xxxxxxxxxxxxx Date: Friday, March 20, 2009, 9:26 PM http://www.msexchange.org -------------------------------------------------------See if this answers any questions on CAS placement.. maybe I’m misunderstanding, but it’s a good read anyway ☺. http://blogs.msdn.com/brad_hughes/default.aspx Thanks. Lee Swanson From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Praveen Ramaswamy Sent: Friday, March 20, 2009 7:44 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] sudden Authntication pop for outlook 2007 We have Exchange 2007 SP1 roll up6 (on windows 2008 sp1)CAS server in 4 sites. One site is separated by firewall and this site has the first CAS server installed in the ORG. Issue is, outlook 2007 users are suddenly getting authentication popup and this pop is from CAS server in different site. Not able to understand why it tries to connect to CAS in other site. We also observed that in outlook proxy setting, the msstd setting gets pointed to the first CAS server URL automatically. This auto discovery is creating hell. Above this out office assistance is not working when NOT connected to domain or not logged on to domain. So now people from internet and people logged on to different domain cannot put out office. Can someone throw some light on this. Not sure what’s wrong. Regards Praveen R ------------------------------------------------------- List Archives: //www.freelists.org/archives/exchangelist/ MSExchange Newsletter: http://www.msexchange.org/pages/newsletter.asp MSExchange Articles and Tutorials: http://www.msexchange.org/articles_tutorials/ MSExchange Blogs: http://blogs.msexchange.org/ ------------------------------------------------------- Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------- To unsubscribe visit http://www.msexchange.org/pages/exchangelist.asp Report abuse to listadmin@xxxxxxxxxxxxxx