De acordo com o livro "Microsoft Windows Server 2003: Guia Delta" (o topo de http://books.google.de/books?id=Yd_U0ROFUvgC&pg=PA33&lpg=PA33&dq = ntfs + compactação + servidor + cliente & source = bl & amp_ots = CbBTrxqr4b & sig = d4dL29WtcqIlSlILOpD59-l-Vus & hl = de & sa = X & ei = Ue-QUZTjI4yHswbQhIHADA & ved = 0CFkQ6AEwBTgK # v = passagem & q = ntfs % 20compression% 20server% 20client & f = false "> página 33 , pastas compactadas) a compactação e a descompactação são feitas no servidor:
Another drawback to NTFS compression is that, because it is a file system attribute, it is compressed only on the file system. The implication of this is that, if you access the file across the network, it is first uncompressed by the operating system and then sent across the network in an uncompressed format. Thus, no network bandwidth improvement occurs because the file is sent across the network as if it were never compressed.
Eu ainda não achei uma página da web da Microsoft tão clara.