I'm getting regular 1030 and 1058 errors in the Server Application log every 5 minutes. They seem to date from when there was a power cut here (the UPS ran out of battery before they realised power was out).
I;ve looked at
Event 1030 and event 1058 may be logged, and you may not be able to start the Group Policy snap-in on your Windows Small Business Server 2003 computer
A Windows Server 2003-based computer may stop responding when it is resumed from standby and events 1030 and 1058 are logged in the application log of a domain controller
I've done a DNS cache flush and dfsutil /PurgeMupCache. I can access the SYSVOL share and the server name can be resolved using NSLOOKUP.
No effect on users but It's become an issue because I need to edit a GP and when I try to open Grou Policy Management from AD U&C, I get a "Failed to open the Group Policy Object. You may not have appropriate rights. Detsils: Configuration information could not be read from the domain controller, either because the machine is unavailable or access has been denied." I'm doing this using remote desktop on the Server using an Admin account.