It is LDAP the question is about / #4413

It should be no problem implementing ldap.
I see to modes being usefull.

1. Admin creates users and checks off to use LDAP instead of giving a password. When a user with the given username tries to login it is authenticated through ldap instead of against the db.
2. Admin sets streber to work in ldap mode. Streber updates its person list against the Directory and the admin can assign accounts to projects.

The users are authenticated through ldap.