Hi, In AS_REP I see that domain controller is sending the enc type as etype: eTYPE-AES256-CTS-HMAC-SHA1-96 (18) however in TGS_REP it is sending as etype: eTYPE-ARCFOUR-HMAC-MD5 (23), This is causing the " Decrypt integrity check failed" error. Any reason why domain controller will behave like it? --Vishal