Changing password via RemoteApp logged on from an RDS Session

Hi,

We have users running a RemoteApp from a Server 2008R2 RDS Server.

For users running the RemoteApp on a Notebook or Desktop they can update their password using CTRL+ALT+END

Users running on thin clients that connect to an RDS Server that they run the RemoteApp on we are unable to use CTRL+ALT+END to change their passwords.  Instead it drops them out of the RemoteApp.

Can someone advise the process or requirements to reset the password via a RemoteApp running via an RDS session?

Cheers,

Sean