ldap - find out details of a user

One of my clients wants to know why a user can not log in to the 开发者_运维知识库portal.

The portal uses the client's LDAP.

Is there a tool/command to run against their Active Directory which will spit out details of the configured user such as permissions/granted hosts and etc?

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What are you looking for?

• An API do to this in a programming environment? If so: which one??

• A Windows command-line tool? There's Joeware's ADFind - part of a whole suite of free AD tools - which is quite amazing - check it out!