So that’s what briefcase was used for… huh never knew that.
Okay I just used Help and Support for briefcase, and it can be done even outside of a network, only with a removable media device.
Here is what Help says to do for over the network syncing:
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Open the folder where you want to create a new Briefcase.
Right-click a blank area in the folder window, point to New, and then click Briefcase.
A new Briefcase appears. Type a name for the Briefcase, and then copy any files you want to sync into the Briefcase.
Note
You can also create a Briefcase on your desktop by right-clicking a blank area on the desktop, pointing to New, and then clicking Briefcase.
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Move the Briefcase over the network to the second computer. For more information about how to do this, see Copy files to another computer.
Make any changes you want to the files on either computer.
When you are ready to sync any changes you have made, right-click the Briefcase, and then click Update All.
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Here is more info:
When would I use Briefcase instead of Sync Center?
Briefcase is included in this version of Windows for people who have used it in earlier versions of Windows and want to continue using it to sync their files. Use Briefcase if you need to keep files in sync between two computers. Use Sync Center if you want to keep files in sync between a computer and a mobile device or folder on a network server.
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I don’t know if you have different systems running different stuff, but I have seen sync center with vista, and I know it can be run as a service in the background keeping stuff synchronized between systems, not sure to what extent, but It didn’t work when I was doing it XP to Vista, but i’d imagine Vista to Vista would work like a charm.