Question : terminal service requires user to re-enter password after idle period

I have a windows 2003 server at location A.  I am running Terminal Services on it.  I TS in from location B via a VPN connection over DSL.  It works properly except for one minor issue.  If the user at location B is idle for a period of time, they are required to re-enter their password.  The session is not disconnected, they just have to re-enter the password to continue working.  I'm sure it is just a setting somewhere, probably within group policy, but I have been unable to locate it.

Answer : terminal service requires user to re-enter password after idle period

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