Forest root is company.com, and the server running this is ad1.company.com. This server also handles DNS for the zone company.com.
I've also created a child domain uk.company.com on another server (FQDN of ad1.uk.company.com) and this has been delegated DNS responsibility (using the DNS wizard) for the uk.company.com DNS zone. DNS on ad1.uk.company.com is set with a root-hint server of ad1.company.com, and DNS on ad1.company.com has the standard a(through m).root-servers.net... Hope this is clear so far. Firstly: given that company.com is essentially only a placeholder domain that we can add other offices (as child domains off the root) to at a later date, and all of our internal servers will be added to the uk child domain, is this a sensible configuration? The main problem though is very strange. At random intervals (several times a day), the ad1.uk.company.com DNS service "forgets" it's root hint server (ad1.company.com) - it shows the name correctly, but the IP address is "Unknown". ad1.company.com is still available and can be connected to (via MMC plugins for example) but in order to get DNS working properly again I need to edit the root-hint entry and navigate to find the server again. There is no problem reselecting it. Then it's a restart on the DNS server, and things go back to normal. There are no event log errors on ad1.company.com and the errors raised on ad1.uk.company.com are Netlogon 5774. I've checked this error out on the MSKB and eventid.net and have disabled secure updates on the ad1.company.com DNS, but it hasn't solved the problem. Does anyone have any other ideas what is causing this?? Note: all servers are Win2K, SP2, all necessary hotfixes upto MS02-014. DNS zones are all AD integrated. Thanks for any advice, Regards, James Hayes List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
