Domain controllers in netowrk

I have 3 controller (A, B, C) in a network, how can I determine which clients using A, B or C  for domain access?
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litmicAuthor Commented:
DC is windows 2003 server
Lee W, MVPTechnology and Business Process AdvisorCommented:
DCs answer somewhat randomly based on how busy they are.  On the client you can see which server authenticated you by running echo %logonserver% should display the server that authenticated you.
Lee W, MVPTechnology and Business Process AdvisorCommented:
(Note: you have to open a command prompt and type that - executing from the run command will, at best, flash a screen for a second and disappear).
Within *single* site if there are multiple DCs, you can just find out who logged on which DC by above commands
However, you cannot control which machine can logon to which DC

If you have multiple AD sites, you need to latch client subnets to appropriate site so that clients can logon to domain controllers within respective site only.
Same time you need to ensure that Domain controllers also are in correct site

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