Hopefully you guys can shed some light on this one.

 

We have an AD domain, childdomain.domain.com.  The domain controllers for childdomain.domain.com are Windows 2000 DCs and they are named (on the Network Identification tab) DC1.domain.com, and DC2.domain.com.  Therefore we have a situation where the DC’s DNS suffix does not match domains DNS suffix.  DC1 and DC2 were setup a number of years ago with this configuration.  We have now introduced a new DC, DC3 into the domain.  DC3 has a FQDN DC3.childdomain.domain.com.  We also now have an Exchange server EX1.childdomain.domain.com.  EX1 registered itself in DNS with its FQDN.  As part of initial config it was rebooted, and came back up with a name EX1.domain.com.  We don’t have control of domain.com (i.e. this part of the puzzle cannot be changed).  My questions;

 

How do we fix this?

Why did EX1 change its FQDN on reboot (what process caused this?)?

 

We tried running fixdomainsuffix.vbs (KB257623) on DC2 but it didn’t work.  DC2 doesn’t hold FSMO roles and maybe this is the problem?

 

Thanks in advance for your help.

 

Tim Foster

 

 

 

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