I've been troubleshooting this problem for two years and it keeps coming back. Our Mac users authenticate to our Active Directory server which is running Windows Server 2008 Standard. One of the Mac users in particular has had a recurring problem where she can't log on and causes her AD account to lock before the maximum log-in attempts has been reached. The problem started again this week and yesterday I reconfigured her networking and Active Directory settings. This morning I logged on to her computer using her ID and password and had no problems. When she tried it twenty minutes later, her account was locked.
All Macs have Snow Leopard 10.6.7 and they all have the same network and AD settings, but this particular Mac continues to have a problem.
Any suggestions will be greatly appreciated.