For all KACE Admins who use LDAP connection via port 389.
Microsoft plans to disable unsecured LDAP on port 389 against the domain controller.

To continue using LDAP authentication and LDAP import, you have to switch to secured LDAP via port 636.

Here are a few links to microsoft articles
https://support.microsoft.com/en-us/help/4520412/2020-ldap-channel-binding-and-ldap-signing-requirement-for-windows
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8563
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/ADV190023