Hello,

I am testing Kerberos S4U2Proxy API (krb5_get_credentials_for_proxy()).  

Client is MIT Kerberos (version 5-1.21.2) test program, krb5-1.21.2/src/tests/s4u2proxy.c. Kerberos KDC is Active Directory (on Windows Server 2016).

On making this API call, the client receives error "-1765328371, KDC can't fulfill requested option". 

Has this functionality been tested with Active Directory? Has it been tested with any other KDCs?

Please share guidance about resolving this issue.

I have reviewed the krb5-bugs archive and did not find a previous bug related to this issue.

thanks,

Rajbir