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Outlook 2007 Continously prompting for password when connect to SBS 2008 Exchange 2007

I have a new SBS 2008 SBS Server and I am configuring my clients for access to the exchange server.  Some Clients are Outlook 2003 and some are outlook 2007.  2003 clients connect just fine.  2007 clients actually connect just fine to the server, but then repeatedly prompt for UN and PW.  It says it is connecting to "Remote.domainname.com".  It will not accept any credentials and continues to prompt.  I can hit Cancel and it seems everything is connected fine, but it will then pop back up again in a few minutes.  I have tried several fixes for this including a reg edit to change the authentication.  Nothing seems to be working.  I can connect with Outlook 2007 using Outlook anywhere from outside the domain without issues.  It seems to only be occuring on the systems that are connected to the domain and running outlook 2007.  I do have valid Cert installed on the server for the remote.domainname.com  Any help is greatly appreciated.  THis is driving me crazy
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Avatar of Syed Mutahir Ali
Syed Mutahir Ali
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Avatar of Bryon H
you might do well to add an A record on your internal dns such that autodiscover.yourdomain.com resolves to the internal ip address of the exchange server

that, and update rollup 9 fixed it for us

of course there's a whole sp out there now past rollup9, and they have rollups after that too... so... get downloading :)
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What is the client version you are using (windows xp, Windows 7). Also have you checked after disabling client side encryption (from outlook profile setting)?