active-directorydomain-controllerwindows-server-2008
We have 2 different locations, and at both site we have multiple domain controllers (Win2008).
In our application we use Serverless Binding to execute our LDAP queries http://msdn.microsoft.com/en-us/library/ms677945(v=vs.85).aspx.
If we look at de DnsHostName of the LDAP://RootDse on site B we always get the default domain controller of site A. Therefor all LDAP queries go much slower.
Is there a way to change the default domain controller per site ?
If you are getting errors trying to resolve the DNS name and the WINS server is not returning proper responses (which what the SMB_NETLOGON packets are), this means that your Win7 machine will not be able to discover a domain controller to talk to. This is inline with the error message you are getting.
To help you troubleshoot those types of errors, enable Netlogon logging by running "nltest /dbflag:2000ffff" and after reproducing the problem look at %windir%\debug\netlogon.log. You will see the machine trying to locate a domain controller and what the errors it is getting are. Once you fix those, it should work fine.
Since you mentioned that the WINS server is supplied by the university, is it actually reachable from the VM? Likely you can't do NetBIOS name resolution because your WINS server is unreachable and your DNS configuration is busted (the error in step 2).
That attribute is populated when you populate the "Logon To" in the properties of the user account. Why that was done in your environment is a question for the person who did it.
Best Answer
This can occur if someone has adjusted the domain controller's DNS priority (or weight) so that lookups would prefer a dc over another. (LdapSrvPriority)
The _ldap values are observable in the dc._msdcs.domain.com dns zone.
This may also occur if someone has adjusted the Netlogon service so that the DNS mnemonics for the LDAP SRV record is not registered, or if one site is configured to register records for another site (Site Coverage).
How to optimize the location of a domain controller or global catalog that resides outside of a client's site
http://support.microsoft.com/kb/306602
DNSRegistrationSettings
http://msdn.microsoft.com/en-us/library/gg251208%28v=prot.10%29.aspx
How DNS Support for Active Directory Works
http://technet.microsoft.com/en-us/library/cc759550%28v=ws.10%29.aspx