Hello We have Windows server offer has the following event log, I have to re-join the computer to DC, but still cannot fix it. he kerberos client received a KRB_AP_ERR_MODIFIED error from the server PC01$. This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm king.org, and the client realm. Please contact your system administrator.

Hello, start here: http://support.microsoft.com/kb/558115 If it doesn't help please provide more informationn about the network setup, amount of DCs, OS version with SP/patch level and how they are located etc.Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Hi, Have you fixed the issue by following the Microsoft KB article “Meinolf Weber” provided? If not, please try to use Active Directory Users and Computers to delete the original computer account that is no longer used. Note: The computer account is identified in the event log message. To perform this procedure, you must be a member of the Domain Admins group, or you must have been delegated the appropriate authority. To delete a computer account by using Active Directory Users and Computers: 1.Log on to a domain controller or another computer that has the Remote Server Administration Tools installed. 2.Click Start, point to Administrative Tools, and then click Active Directory Users and Computers. 3.Locate the computer account in Active Directory Domain Services (AD DS). 4.Right-click the computer account, and then click Delete. For more information, please refer to the following TechNet article: Event ID 4 — Kerberos Client Configuration http://technet.microsoft.com/en-us/library/cc733987(WS.10).aspx Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.