setting up ldaps on active directory

We now need to authenticate to our university active directory.  In order to do that they require our domain controller use ldaps.  Am I required to get a certificate for this?  I've read several articles on how to do this and some say you have to order a certificate and others look like you don't.  I have no clue so thought I'd better ask for the correct process.
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Your questions is not quite clear.

Is this a Domain Controller operated by the University, or a Domain Controller operated by yourself ?

If the Domain Controller is operated by the University and they require you to use LDAPS against it, then unless the Domain Controller uses a public certificate you would need the public root certificate of the University CA on your client.

If it is your own Domain Controller, you have three main options, which in my order of preference would be

1/ configure your own root CA server
2/ use a public certificate
3/ use a self signed certificate

You can use AD to "push" the root certificate to Domain joined Windows clients, for all other clients you would need to use another method to distribute the root certificate.
cindyfillerAuthor Commented:
Their system needs to come in to authenticate to the active directory on my domain controller.  

Can you provide steps for doing #1 if that is your recommendation?
Making Bulk Changes to Active Directory

Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.

Jamie McKillopIT ManagerCommented:

You are best off using a public certificate. They are inexpensive and it isn't worth the hassle of tryng to setup your own CA.

cindyfillerAuthor Commented:
Will these same instructions work for windows server 2008?  I noticed these are for 2003.
From the first paragraph.

 "Applies to Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2"
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