Using AD plugin and having problems where Macs are randomly not authenticating against our Active directory. Error appears to around not finding local DC. When I use a sniffer appear to find every remote domain we have. Even when I select prefer this domain server problems persist and I get regular localhost /System/Library/LoginPlugins/MCX.loginPlugin/Contents/MacOS/MCXCacher: DSOpenNode(): dsOpenDirNode("/Active Directory/ourdomain.com") == -14002 problem.
After ten minutes AD authentication possible, assume service sorts itself out.