I am receiving the following 3 errors in my DNS Event Viewer:


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DNS server has updated its own host (A) records. In order to ensure that its DS-integrated peer DNS servers are able to replicate with this server, an attempt was made to update them with the new records through dynamic update. An error was encountered during this update, the record data is the error code.

If this DNS server does not have any DS-integrated peers, then this error
should be ignored.

If this DNS server's Active Directory replication partners do not have the correct IP address(es) for this server, they will be unable to replicate with it.

To ensure proper replication:
1) Find this server's Active Directory replication partners that run the DNS server.
2) Open DnsManager and connect in turn to each of the replication partners.
3) On each server, check the host (A record) registration for THIS server.
4) Delete any A records that do NOT correspond to IP addresses of this server.
5) If there are no A records for this server, add at least one A record corresponding to an address on this server, that the replication partner can contact. (In other words, if there multiple IP addresses for this DNS server, add at least one that is on the same network as the Active Directory DNS server you are updating.)
6) Note, that is not necessary to update EVERY replication partner. It is only necessary that the records are fixed up on enough replication partners so that every server that replicates with this server will receive (through replication) the new data.

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The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is "". The event data contains the error.

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The DNS server was unable to complete directory service enumeration of zone corp.yodock.com. 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 extended error debug information (which may be empty) is "". The event data contains the error.
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There are no replication partners. The server can ping external URL's and external computers can ping the server. There are no duplicate computers listed in Active Directory. When users in the office connected to the server attempt to synchronize their offline files, they get an error message that the domain controller cannot be reached.

I'm ready to pull my hair out here - any suggestions would be greatly appreciated!

Running NETDIAG returns these results (I removed identifying information):

........................................

Computer Name: COMPUTERNAME
DNS Host Name: HOSTNAME
System info : Microsoft Windows Server 2003 R2 (Build 3790)
Processor : x86 Family 6 Model 15 Stepping 11, GenuineIntel
List of installed hotfixes :
KB921503
KB924667-v2
KB925398_WMP64
KB925876
KB925902
KB926122
KB927891
KB929123
KB930178
KB931784
KB932168
KB933360
KB933729
KB933854
KB935839
KB935840
KB936021
KB936357
KB936782
KB938127-IE7
KB938464
KB939653-IE7
KB941202
KB941568
KB941569
KB941644
KB941672
KB941693
KB942615-IE7
KB942763
KB942830
KB942831
KB943055
KB943460
KB943484
KB943485
KB944533-IE7
KB944653
KB945553
KB946026
KB947864-IE7
KB948496
KB948590
KB948745
KB948881
KB949014
KB950759-IE7
KB950760
KB950762
KB950974
KB951066
KB951072-v2
KB951698
KB951746
KB951748
KB952069
KB952954
KB953155
KB953838-IE7
KB953839
KB954211
KB954550-v5
KB954600
KB955069
KB955839
KB956390-IE7
KB956391
KB956802
KB956803
KB956841
KB957095
KB957097
KB958215-IE7
KB958644
KB958687
KB958690
KB960225
KB960714-IE7
KB960715
KB961063
KB961064
KB961118
KB961260-IE7
KB967715
Q147222


Netcard queries test . . . . . . . : Passed



Per interface results:

Adapter : Local Area Connection

Netcard queries test . . . : Passed

Host Name. . . . . . . . . : HOSTNAME
IP Address . . . . . . . . : zz.zz.z.zzz
Subnet Mask. . . . . . . . : 255.255.255.0
Default Gateway. . . . . . : zz.zz.z.1
Primary WINS Server. . . . : zz.zz.z.zzz
Dns Servers. . . . . . . . : zz.zz.z.zzz
xx.xxx.xxx.xx
yy.yyy.y.yy


AutoConfiguration results. . . . . . : Passed

Default gateway test . . . : Passed

NetBT name test. . . . . . : Passed
[WARNING] At least one of the <00> 'WorkStation Service', <03> 'Messenge
r Service', <20> 'WINS' names is missing.

WINS service test. . . . . : Passed


Global results:


Domain membership test . . . . . . : Passed


NetBT transports test. . . . . . . : Passed
List of NetBt transports currently configured:
NetBT_Tcpip_{796B1D56-3CE5-4B61-BDB8-708A03E333EE}
1 NetBt transport currently configured.


Autonet address test . . . . . . . : Passed


IP loopback ping test. . . . . . . : Passed


Default gateway test . . . . . . . : Passed


NetBT name test. . . . . . . . . . : Passed
[WARNING] You don't have a single interface with the <00> 'WorkStation Servi
ce', <03> 'Messenger Service', <20> 'WINS' names defined.


Winsock test . . . . . . . . . . . : Passed


DNS test . . . . . . . . . . . . . : Passed
PASS - All the DNS entries for DC are registered on DNS server 'zz.zzz.z.zzz'
.
[WARNING] The DNS entries for this DC are not registered correctly on DNS se
rver 'yy.yyy.yyy.yy'. Please wait for 30 minutes for DNS server replication.
[WARNING] The DNS entries for this DC are not registered correctly on DNS se
rver 'xx.xxx.x.xx'. Please wait for 30 minutes for DNS server replication.


Redir and Browser test . . . . . . : Passed
List of NetBt transports currently bound to the Redir
NetBT_Tcpip_{796B1D56-3CE5-4B61-BDB8-708A03E333EE}
The redir is bound to 1 NetBt transport.

List of NetBt transports currently bound to the browser
NetBT_Tcpip_{796B1D56-3CE5-4B61-BDB8-708A03E333EE}
The browser is bound to 1 NetBt transport.


DC discovery test. . . . . . . . . : Passed


DC list test . . . . . . . . . . . : Passed


Trust relationship test. . . . . . : Skipped


Kerberos test. . . . . . . . . . . : Passed


LDAP test. . . . . . . . . . . . . : Passed


Bindings test. . . . . . . . . . . : Passed


WAN configuration test . . . . . . : Skipped
No active remote access connections.


Modem diagnostics test . . . . . . : Passed

IP Security test . . . . . . . . . : Skipped

Note: run "netsh ipsec dynamic show /?" for more detailed information


The command completed successfully

Just in case anyone else ever runs into a similar problem, I resolved this issue through trial and error. Turns out when I downloaded the Windows update, it activated the Windows Firewall, which was blocking the connections. As soon as I turned the windows firewall back off, everything was running smoothly again.

Thats wierd. Was this windows server 2003? I thaught that came with the firewall off by default anyway (at least in my version - r2 enterprise)

Yes, it is Windows Server 2003. The firewall has never been turned on before. I'm not sure how or why it got turned on last week, the only answer I could come up with though was that it happened when I downloaded an update because that is when we started having problems.