MIT Kerberos for Windows 2.6.x or 3.x.x if Kerberos v5 authentication support is desired. The recommended release is version 3.2.2. For 64-bit Windows installations, the 64-bit version of Kerberos for Windows is required. For 32-bit Windows installations, the 32-bit version of Kerberos for Windows is required. See 3.2 Kerberos v5 Requirements for additional details.