Entire Network browser issue on domain

Hi, we are having network browsing issues on our domain. Office A in one city shows the computers on the network here. Office B in another city sees its computers on the network there. There is a link between offices and both can ping/browse to a computer manually by name.

What do we need to do to make all the computers in both offices show up combined at each office in “Entire Network” rather than just seeing the computers in our own city?

Another related problem is on occasion Office A will stop showing it’s computers and show the computers in Office B in “Entire Network”.

Can both of these be fixed by changing something?