[CentOS] vectoring IRC / Jabber logins to AD?

Excuse my ignorance (I just got crap on the #centos IRC channel for this
question), but is there a (easy!) way to have and IRC and/or Jabber server
relay a login to a Microsoft Active Directory server for authentication?
If there's a better question to ask this question, please point me in that
direction, and I'll be happy to do so

Thanks
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