[THIN] Profile Size

Lately,
 
I have noticed that the logoff time for the users have increased due to
there profile size. Is there a piece of software that we can use to clean
terminal server profiles at night?
 
Also, how can I restrict the ntuser.dat file. This file seem to grow larger
each day. I know I can limit there profile directory with a policy but what
about the file itself. I don't want the user receiving an error stating
there profile is too large.
 
Thanks for your help in advance.

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