If you want to limit the bandwidth usage when you copy files with robocopy you can use the following syntax:
To copy a directory using /IPG to limit bandwidth usage. General rule of thumb /IPG:750 will use roughly 1Mbps.
Robocopy /ipg:750 /z /r:3 /w:3 /tee /LOG+:c:\robolog.txt \\server1\share \\server2\share
You can find more here:
When the Windows 7 desktops suffers slowness refresh of folders mapped and for do not disable the SMB2 on a Win 2008 file server (scanners maybe could stop accessing) you should create an entry in the register of W7 to force the refresh.