Live Communications Server 2005 Windows Authentication

I have a Live Communications Server 2005 that is up and running with a named instance of

I already had a DC and my Active Directory setup and populated prior to setting up this server.  I need to know what configurations/changes I need to make so that when a user that has a valid SIP in AD logs on to his/her windows machine they don't also have to log into their office communicator; I would like them to be authenticated to the LCS based on having successfully authenticated to AD.

I am new to LCS so any and all help is greatly appreciated.

Thank you,
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Justin OwensConnect With a Mentor ITIL Problem ManagerCommented:
LCS 2005 doesn't support (that I remember) single logon.  In other words, it is written into the client to require username and password.  You can set the client to remember those credentials so that they only have to be remembered one time, but they do have to be set up at least once.
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