How To Fix XT018 - Domain controller &1 invalid (new controller: &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: XT - Transport Management System

• Message number: 018

• Message text: Domain controller &1 invalid (new controller: &2)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message XT018 - Domain controller &1 invalid (new controller: &2) ?

  The SAP error message XT018 "Domain controller &1 invalid (new controller: &2)" typically indicates an issue with the domain controller configuration in the SAP system. This error can occur in various scenarios, particularly when there are changes in the network environment or when the system is unable to communicate with the specified domain controller.
  Cause:
  
  Invalid Domain Controller: The specified domain controller (&1) is not valid or reachable. This could be due to network issues, incorrect configuration, or the domain controller being offline.
  DNS Issues: Problems with DNS resolution can prevent the SAP system from locating the domain controller.
  Configuration Changes: Changes in the network configuration, such as moving the SAP system to a different domain or changes in the Active Directory setup, can lead to this error.
  Expired or Invalid Credentials: If the credentials used to connect to the domain controller are expired or invalid, this error may occur.
  
  Solution:
  
  Check Domain Controller Status: Ensure that the specified domain controller is online and functioning correctly. You can use tools like ping or nslookup to verify connectivity and DNS resolution.
  Verify Configuration: Check the SAP system configuration for the domain controller settings. Ensure that the correct domain controller is specified and that there are no typos or misconfigurations.
  DNS Configuration: Ensure that the DNS settings are correct and that the SAP system can resolve the domain controller's hostname. You may need to update the DNS settings or flush the DNS cache.
  Review Network Settings: If there have been recent changes to the network, review the settings to ensure that the SAP system can communicate with the domain controller.
  Check User Credentials: Verify that the credentials used for the connection to the domain controller are valid and have not expired. If necessary, update the credentials.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on domain controller configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  System Logs: Review the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.