First step: Ensure the severs are registering their RR and SRV records to
DNS. Then ensure those records are in DNS and that all references to them
are up-to-date. I'd make a first stop in the _MSDCS folder to see if all
the DCs in your forest are appropriately represented there.

-ds


"jering" <jering@discussions.microsoft.com> wrote in message
news:1FD9864B-6CB7-4F50-A0B0-22AE7FB17F7B@microsoft.com...
> The server is a Windows Server 2003 Std w/ SP1 which is a domain
> controller,
> fileserver and printserver.
> During the last two days several DNS-errors have occured in ths DNS
> Server-log:
>
> Event ID: 4000
> Source: DNS
> Type: Error
> Description: The DNS server was unable to open Active Directory. This DNS
> server is configured to obtain and use information from the directory for
> this zone and is unable to load the zone without it. Check that the Active
> Directory is functioning properly and reload the zone. The event data is
> the
> error code.
>
> Event ID: 4004
> Source DNS
> Type Error
> Description The DNS server was unable to complete directory service
> enumeration of zone .. This DNS server is configured to use information
> obtained from Active Directory for this zone and is unable to load the
> zone
> without it. Check that the Active Directory is functioning properly and
> repeat enumeration of the zone. The event data contains the error.
>
> Event ID: 4015
> Source DNS
> Type Error
> Description The DNS server has encountered a critical error from the
> Active
> Directory. Check that the Active Directory is functioning properly. The
> event
> data contains the error.
>
> The 4000-event occurs most frequently.
>
> What should I do to track this issue down?
>