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Outlook XP will not authenticate to Exchange 2003 keeps asking for user password / nt credentials

I have a Windows 2003 Server SP1 with current updates, Exchange 2003 with all SP and udates.  There was a problem with the Group Policy infrastructure in the DC and group policies wre not being applied.  The problem was fixed and the Default Domain Policy which comes pre-configured with password to expire in 42 days was accidentally applied.

When all the users password expired and the users proceeded to change it all Outlook XP clients lost the ability to authenticate to the Exchange 2003 server.  this occurs in Windows 2000 Pro and Windows XP stations.

I set up two new computers with Office XP only and downloaded all relevant service packs.  So I now have two brand new Windows 2K and XP Installations with Office XP all updates applied and no additional software.  The problem persists, I can't authenticate using Office XP, with Office 2003 I hav no problems.

Roaming profiles are not being used and the user profiles in these 2 workstations are new as well.

I have tried all the solutions found in Microsoft regarding RPC connectivity, the Registry entries, the RPC binding order and I also used the RING tool to establish RPC connections with the Exchange server.  The rping connections were sucsessful and the RPC Registry entries are correct.

Thank you
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Hypercat (Deb)
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maacevedo

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hypercat:

I was not able to find the Manage Passwords under Advanced in the Users control panel applet.  I don't think it is due to cachd passwords since I re-formatted the computer and re-installed everything from scratch.  The problems happens when running login in with the user for the very first time and running outlookk for the very first time.  I even created a new user to make sure that the user had never logged into this network before.  Outlook XP is not setup to ask for password everytime.  It configured for Password Authetication.  I've read in some threads that I should user Kerberos/NTLM Password Authentication (configured in the More Settings Button in the Exchange server account configuration screen), but I don't have this option in Outlook XP, I do have it in Outlook 2003.

Rob132332:
It is a related question but not the same.  I am having a problem with authentication, even if I enter the correct credetials in the password screen Outlook comes back and asks for the password again.

Thank you both for you suggestions.

Mario
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It looks like some one at my client ran the Microsoft Script to recreate the Default AD policies.  This removed the Exchange Enterprise Servers group from the Default Domain Controller policy / Computer Configuration / User Rights Assignment / Manage auditing and security log.  This created the problem that the Exchange server could see and find the Global Catalog but could not actually use it.

Outlook 2003 clients did not have this problem because Outlook 2003 queries the GC directly whereas the Outlook XP client uses Exchange as proxy.

For more info:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;896703

Thanks for all your help.  I have split the points as a percentage of the number of posts.

That sounds great.  This question still seems open though.