exchange talking to the domain

I just installed Exchange 2007 into my domain with Exchange 2003 and I am
getting the following errors but i am able to ping, nslookup, and it looks
like i have a good configuration. Any ideas?

Event Type: Error
Event Source: MSExchange ADAccess
Event Category: Topology
Event ID: 2104
Date: 3/7/2008
Time: 10:44:04 AM
User: N/A
Computer:
Description:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1308). None of the domain
controllers in the domain are responding. This event can occur if the domain
controllers in local or all domains become unreachable because of network
problems. Use the Ping or PathPing command-line tools to test network
connectivity to local domain controllers. Run the Dcdiag command line tool
to test domain controller health.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.


Event Type: Error
Event Source: Userenv
Event Category: None
Event ID: 1053
Date: 3/7/2008
Time: 10:44:05 AM
User: NT AUTHORITY\SYSTEM
Computer:
Description:
Windows cannot determine the user or computer name. (The specified domain
either does not exist or could not be contacted. ). Group Policy processing
aborted.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.


Event Type: Error
Event Source: MSExchange ADAccess
Event Category: Topology
Event ID: 2120
Date: 3/7/2008
Time: 10:44:16 AM
User: N/A
Computer:
Description:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1308). Error ERROR_TIMEOUT
(0x800705b4) occurred when DNS was queried for the service location (SRV)
resource record used to locate a domain controller for domain
mc.tmaresources.com
The query was for the SRV record for _ldap._tcp.dc._msdcs.domain.com
.. The DNS servers used by this computer for name resolution are not
responding. This computer is configured to use DNS servers with the
following IP addresses:
dc2's ip
dc1's ip

.. Verify that this computer is connected to the network, that these are the
correct DNS server IP addresses, and that at least one of the DNS servers is
running.
For information about correcting this problem, type in the command line:
hh tcpip.chm::/sag_DNS_tro_dcLocator_messageB.htm

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.



Event Type: Error
Event Source: MSExchangeSA
Event Category: General
Event ID: 1005
Date: 3/7/2008
Time: 10:44:18 AM
User: N/A
Computer:
Description:
Unexpected error No authority could be contacted for authentication. ID no:
80090311 Microsoft Exchange System Attendant occurred.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.






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