I haven't been deeply involved in LDAP in years, but when I ran a server at a place (on CentOS 5,x, I think), I could use phpldapadmin which is in ports. I mention its CentOS setup in a REALLY old page of mine
https://srobb.net/ldap.html#phpldapadmin but I make no guarantee of the accuracy or application to FreeBSD with it. I just vaguely remember at that time, a lot of women at that company were getting married, and I always offered to give them a screen shot of their name change in LDAP when they changed their email from their married to maiden name (it was an are you sure you want to change mary.smith to mary.jones type of thing), and almost all of them wanted the screenshot.
And yes, LDAP can be a pain. I haven't dealt with it in years, but the people who wrote LDAP for Rocket Scientists wrote