How can I connect to any windows machine of a network manage by Windows Small Bussiness?

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http://serverfault.com – I have to do help-desk on a group of windows machines that are in a network managed by a Windows Small Business server. I would to do many tasks using remote desktop. I would to know if it is possible to configure the server (only with the windows stuff) to obtain the hability to connect using remote desktop to every machines in the network from my remote office. I suppose that the most of the tasks consist in repair office files, reconfigure prints, free hard disk spaces and similar jobs that don't need physyc presencial. (HowTos)