Windows 2000/2003 KDCs

[Pierre Goyette]

Various articles mention that after you create a mapped user account in
Windows 2000 or Server 2003 (for application servers), that you should
change the password (I assume to the same one) once after running ktpass
to ensure that the DES key gets created.
 
I am trying to understand exactly what this does because I have never
done this and everything works fine for me.
 
Under what conditions should you do this?
 
TIA
 
Pierre