I made a tool to track ldap like that [0]. LDAP is a treasure chest of info and great for stalking. for some reason i find it fascinating to see people leaving, and if possible, see how long they worked there for. seeing friends get fired via LDAP before they even knew about it was certainly interesting, too.

I noted in the readme..

    Know what's going on in your LDAP directory on-demand with Slack webhook integration.
    See new hires, leavers, and promotions as they appear in LDAP.
    Monitor when and what HR is doing.
    Detect unauthorized changes in LDAP.
    Monitor for accidentally leaked data.
    Detect when users are logging in and out of LDAP.

There's also LDAPmonitor[1] which is designed for Microsoft and Active Directory which does effectively the same thing.

[0]https://github.com/MegaManSec/LDAP-Monitoring-Watchdog

[1]https://github.com/p0dalirius/LDAPmonitor