Exchange/Outlook Domain questions

Hi

So we have 2 Exchange server 2007
3 DC (2003 ans 2008)

This is the bug:

i want to get rid of the 2003 so in exchange, in the Organisation Configuration, I have change the Domain Controller to my DC 2008
but when i does this, OUTLOOK Always ask for the Crendentials !!

i change back to the old 2003 dc and no password is required !

What do you think ?
LVL 1
Victor CharpentierIt technicianAsked:
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Greg BessoIT Solutions EngineerCommented:
Not sure if this is relevant, but my first thought is that kerberos authentication is getting tripped up. Perhaps check the computer objects in AD for your domain controller and see if Kerberos is enabled under the Delegation tab?
Victor CharpentierIt technicianAuthor Commented:
which computer ... my domain or my exhange ?
Mahesh SharmaCommented:
Whats the authentication level set on new DC and old DC
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
Look for key lmcompatibilitylevel

Check for disabling loopback
http://weblogs.asp.net/andresv/authentication-problems-in-windows-2008-r2-and-loopback-ip

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Victor CharpentierIt technicianAuthor Commented:
one at 2 one at 3 ... i will try this tonight !
Victor CharpentierIt technicianAuthor Commented:
Thank you SIR
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