Unable to change AD password on non-bound client macs

Macs running 10.4.6 – 10.5.* ppc and intel cannot change passwords via the MS UAM. Other macs using the MS UAM (cmd+K –> afp://servername brings up the MS UAM and allows AD password changes.) are able to change their network password.

I manage approx. 60 macs in a win-centric environment. I am an entry level tech.

We have a Windows Server 2003 with AD.
The macs are not bound to AD.
Without Binding, is there a way to enable these macs to change their password? Ideally I would like an updated UAM from MS, but …

Any help would be greatly appreciated.

We have implemented expiration policies and my mac users need the ability to change their passwords, without being bound to the domain.

I am aware of admit mac, centrify, and extremeZ-ip. We don’t want to / can’t afford to spend that amount of money on something that has a bunch of features we don’t need/want.

Really, the only problem we have with the macs on the win network is the inability to change passwords.