[horde] Auth via Active Directory

[mbrei-lists at carolina.rr.com]

Greetings,

Could anyone shed some light on Horde's ability to authenticate against a Win2k active directory domain?  I have 150 potential users for Horde but need to be able to have them log in with their domain account so that they're forced to change their password on a regular basis.  So far this looks like great software, but my being able to use it is now entirely dependant on auth against AD.

Red Hat 8.0
Apache 2.0.46
PHP 4.3.2
mysql 3.23
Horde 2.2.4

Thank you,
Matt