https://bugs.openldap.org/show_bug.cgi?id=9547
--- Comment #1 from Michael Ströder michael@stroeder.com --- On 5/5/21 2:39 PM, openldap-its@openldap.org wrote:
causing a mismatch between the SPN in the client "ldap/adlds.my.domain" and the one registered in AD "ldap/adlds.my.domain:50000"
I have some doubts that it's correct to add the port number to servicePrincipalName in MS AD. Did you try without?