Below is the error I am getting when the two Error id: 1925 The attempt to establish a replication link for the following writable directory partition failed. Directory partition: DC=kq,DC=kenya-airways,DC=com Source domain controller: CN=NTDS Settings,CN=LONBDC001,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Conf iguration,DC=kq,DC=kenya-airways,DC=com Source domain controller address: f2d9bdd4-7b27-4a55-a6d6-6466fd77ff31._msdcs.kq.kenya-airways.com Intersite transport (if any): This domain controller will be unable to replicate with the source domain controller until this problem is corrected. User Action Verify if the source domain controller is accessible or network connectivity is available. Additional Data Error value: 8418 The replication operation failed because of a schema mismatch between the servers involved. For more information, see Help and Support Center at Error id: 1308 The Knowledge Consistency Checker (KCC) has detected that successive attempts to replicate with the following domain controller has consistently failed. Attempts: 27 Domain controller: CN=NTDS Settings,CN=KENYA-3CQT6OXXE,CN=Servers,CN=Default-First-Site-Name,CN=Sites,C N=Configuration,DC=kq,DC=kenya-airways,DC=co Period of time (minutes): 1160 The Connection object for this domain controller will be ignored, and a new temporary connection will be established to ensure that replication continues. Once replication with this domain controller resumes, the temporary connection will be removed. Additional Data Error value: 8524 The DSA operation is unable to proceed because of a DNS lookup failure. For more information, see Help and Support Center at DNS is working perfectly because it is only one on the same subnet. For London I have also point to the Head Office DNS. Can someone help. Regards Thomas Kamire Systems Engineer Kenya Airways Ltd Ext.: +254 (20) 6422311 Tel: +254 722 483253 / 499884 DISCLAIMER: This message and any attachments are confidential and may be legally privileged or otherwise protected from disclosure. Although the necessary precautions have been taken, Kenya Airways does not accept legal responsibility for any damage whatsoever that is caused by viruses being passed or for the contents of this message. This message, and any attachments, are intended solely for use by the named addressee. If you are not the intended recipient, you must not copy them or disclose their contents to any other person. If you have received this message in error, please notify the sender by return e-mail and delete any attachments accompanying it immediately. "PLEASE NOTE THAT OUR OPERATOR NUMBER HAS CHANGED TO - +254-20-642 2000"