Content-Type: text/plain Content-Disposition: inline Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.411 (Entity 5.404) Subject: W2K+3 vs MIT RC4-HMAC based cross-realm trusts X-RT-Original-Encoding: iso-8859-1 Content-Length: 308 LsaQueryTrustedDomainInfoByName LsaSetTrustedDomainInfoByName setup the trust attribute #define TRUST_ATTRIBUTE_TRUST_USES_RC4_ENCRYPTION 0x00000080 0x80 is what you need to add to the existing attributes only applicable if the trust type is MIT trust #define TRUST_TYPE_MIT 0x00000003