Mac OSX and SBS 2003 shares keep dropping

I have a network that has both PC's and Macs. The domain controller is SBS 2003. Every so often the Macs lose their connection to their shares on the file server which is part of the windows domain. This server is running Server 2003 X64. I have tried stopping/restarting the Macintosh file sharing service and it doesn't work, I end up having to restart the SBS server to get the Macintosh clients to connect.

Shortly after the Macs lose their connectivity, these errors are displayed:

Critical Errors in Application Log

Userenv
 1054
 3/31/2009 7:45 AM
 77 *
 
Windows cannot obtain the domain controller name for your computer network. (The specified domain either does not exist or could not be contacted. ). Group Policy processing aborted.
 

 
Userenv
 1006
 3/31/2009 4:49 AM
 4 *
 
Windows cannot bind to corp.domain.com domain. (Local Error). Group Policy processing aborted.
 

 
Userenv
 1030
 3/31/2009 4:49 AM
 4 *
 
Windows cannot query for the list of Group Policy objects. Check the event log for possible messages previously logged by the policy engine that describes the reason for this.


It sounds like some sort of issue with group policy, but I'm not sure.
 

 
brian116Asked:
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Philip ElderConnect With a Mentor Technical Architect - HA/Compute/StorageCommented:
Did you run the post SP2 update to disable Receive Side Scaling?
SP2 Release Notes: http://technet.microsoft.com/en-us/library/cc773361.aspx
And the SBS specific notes:
http://support.microsoft.com/kb/939421

Go here: www.sbsbpa.com and download the Best Practices Analyzer for SBS 2003.

Install it and run it. You will find out very quickly what you are missing and what is broken.

Make sure the NIC drivers on your SBS box are up to date too.

Philip
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brian116Author Commented:
Everything is set up as it should be as stated in the above links. The issue is not the macs initially connecting but they seem to lose connectivity daily, the only way to reconnect them is to reboot the SBS server.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Has SP2 for Windows Server 2003 been applied to the SBS box?

Philip
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brian116Author Commented:
Yes SP2 was installed. I've read it can cause certain issues within SBS, I've already had to fix one where it uninstalled the windows help service. Could this be causing issues with SMB services also?
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