I have windows server 2003 domain one of my clients does not joining the domain . the following error occurred attempting to join the domainno mapping between account names and security ids was done. but if i change the computer name then it join the domain easily but i do'nt want to change computer name . Kindly suggest some solution.

that is longhorn forum - not a w2k3 change the name back to one you need and try to join it. if computer was cloned - change system SID.