Advantages of using LDAP? [2]
Some of the advantages of LDAP are

Runs over TCP/IP and SSL

Allows the user to create multiple directories

It is based on a previous deployed technology

Available on nearly on all Operating Systems

Simple to use and simple to manage

Disadvantages of using LDAP [3]
The disadvantages of LDAP are as follows:

There is a limited number of directories that can be created

At the end it becomes a heavy weight protocol because of the information stored will start to build up.

Clients side information starts to become more complicated

How can it be improved?
Having a User Interface can sometimes make things easier but not in the case of the LDAP configuration. When I used the User Interface I was so confused I didn't get a thing on it.

A good User Interface is suppose to guide through the complicated stuff

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