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The choosing of AD DC

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  • The choosing of AD DC

    I have been struggling with understand why my local site clients would be accessing a DC across a WAN to authenticate? I have looked at my AD SAS and the DCs are in the correct locations mapped with the right subnets. Also when I open my AD UAC tool from my desktop it just randomly picks a DC, then when I change the DC and check the box that saves this configuration for the console, the next time I open it, it picks a random DC again? What is going on?

  • #2
    Re: The choosing of AD DC

    If the clients are pointing to the local DCO for DNS then you'll have to verify that the correct SRV records are registered under the _sites.domainname zone for the respective site.

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    • #3
      Re: The choosing of AD DC

      Originally posted by Stevenjwilliams83 View Post
      I have been struggling with understand why my local site clients would be accessing a DC across a WAN to authenticate? I have looked at my AD SAS and the DCs are in the correct locations mapped with the right subnets. Also when I open my AD UAC tool from my desktop it just randomly picks a DC, then when I change the DC and check the box that saves this configuration for the console, the next time I open it, it picks a random DC again? What is going on?
      It should pick a random server from the local site. If the site is unavailable then it tries to select one specified by a metric.

      Do you have a GC on each site that processes logons?

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      • #4
        Re: The choosing of AD DC

        I am not sure how to rate threads of replies. I did manage to get this working correct. It was all AD sites and services and how my sites subnets are setup.

        All sites have a 10.70.X.0 subnet and rather than creating individual subnets and mapping them to the local DC, it was setup with just one 10.70.0.0/16 subnet which will then just pick a random DC within that entire subnet, which happened to be at times across the world.

        Thanks for the direction!

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