Exchange 2007 Application Log Error AD failed DNS

EEuser 357778
EEuser 357778 used Ask the Experts™
IM getting this in my application logs and i can figure out how to fix it.

currently my DNS server has set to the internal IP of the exchange server.  so if you do a ping from the exchange server to you get

Event Type:      Warning
Event Source:      MSExchange ADAccess
Event Category:      Topology
Event ID:      2105
Date:            7/18/2009
Time:            6:07:10 PM
User:            N/A
Computer:      EXCHANGE
Process MAD.EXE (PID=2128). Exchange Active Directory Provider failed to obtain DNS records for domain DNS Priority and Weight for the Domain Controllers in this domain will be set to the default values 0 (priority) and 100 (weight).

For more information, see Help and Support Center at

what can i do or what does the dns need to be set to?  tks
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Ensure that you have the DNS servers in the network configuration set to use the domain controllers ONLY. No external DNS servers should be set on any network card anywhere in the network. If you need to use external DNS servers for DNS resolution to work on the internet, then configure forwarders on the domain controllers in the DNS server applet.

Senior System Engineer
check your dns settings. how many dns servers do you have .. if more than one..
check which is set as primary..
are you able to do nslookup and resolve the host names...?


closing ee sux

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