Very good exchange article collections - Exchange Insider Articles.

http://technet.microsoft.com/en-us/library/aa996113.aspx

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Domain Controller Location Process

http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/distrib/dsbc_nar_azuo.mspx?mfr=true

Network Determination Behavior for Network-Related Group Policy Settings

http://www.microsoft.com/technet/community/columns/cableguy/cg0504.mspx

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