X-RT-Interface: Web Message-ID: X-Mailer: MIME-tools 5.507 (Entity 5.507) MIME-Version: 1.0 Content-Disposition: inline References: In-Reply-To: Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: binary X-RT-Original-Encoding: utf-8 RT-Send-CC: Content-Length: 393 I can connect to a 1.15 kadmind with the 1.17 kadmin.  While there may be a behavior difference leading to a connection error in your deployment, there is not a universal incompatibility.

Please collect trace logs of the 1.15 and 1.17 kadmin clients, by setting the KRB5_TRACE environment variable to a filename ("KRB5_TRACE=/path/to/filename kadmin").