Using github pwm to notify remote users of pending password expiration

We have a small (two OES server) Network running OES 23.4, GroupWise 23.4, GroupWise Messenger 23.4 and ZENworks Configuration Management 23.4. Most of our users are remote and do not come into the office to log into the OES network, so I believe the Client Password expiry notices will not notify them when their password is about to expire since they aren't logging into the network.  GroupWise, Messenger and ZCM all have remote access to the OES servers and I can successfully change a user's password remotely using ZCM if the password hasn't expired before they change it.  My problem is how to let them know that the password will expire in 'X' days when they are remote so they can use ZCM to remotely change it.

What is the best method of doing this?

Thanks,

Dan