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PDC lookup in a native mode AD?

Author
12 May 2006 3:15 PM
Transam388
Lately one of our Exchange 2003 bridgeheads has been having latencies in LDAP
queries.  I know which global catalog server it is going to but I also saw
where they state that Exchange will try to find a PDC also.  In a native AD
and native 2003 exchange environemnt does Exchange actually still try to find
a PDC emulator?  Second question.  MS has said that it has not approved using
Exchange without a WINS server as apparently even in Exchange 2003 it does
netbios lookups and uses WINS instead of DNS.  Seems dumb that DNS is
supposed to be the root of and AD domain and that Exchange would still trying
to use WINS.  Is this true or can WINS be removed in a native AD and Exchange
environment?  I ask as this was also considered as one of the causes for
these LDAP delays as we had disabled WINS.

Thanks for your help!!

Author
12 May 2006 7:24 PM
Mark Arnold [MVP]
On Fri, 12 May 2006 08:15:01 -0700, Transam388
<Transam***@discussions.microsoft.com> wrote:

>Lately one of our Exchange 2003 bridgeheads has been having latencies in LDAP
>queries.  I know which global catalog server it is going to but I also saw
>where they state that Exchange will try to find a PDC also.  In a native AD
>and native 2003 exchange environemnt does Exchange actually still try to find
>a PDC emulator?  Second question.  MS has said that it has not approved using
>Exchange without a WINS server as apparently even in Exchange 2003 it does
>netbios lookups and uses WINS instead of DNS.  Seems dumb that DNS is
>supposed to be the root of and AD domain and that Exchange would still trying
>to use WINS.  Is this true or can WINS be removed in a native AD and Exchange
>environment?  I ask as this was also considered as one of the causes for
>these LDAP delays as we had disabled WINS.
>
>Thanks for your help!!

Regarding NetBIOS name resolution for E2K and E2K3:
http://support.microsoft.com/kb/837391/en-us

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