I have a small peer2peer network and I use 1 where I store my documents. Everything is networking well except for my attachments for my mail on one computer. Lets call my the one I use for storage PC1. On PC2 when I try to attach a doc from PC1, PC1 doesn't show up. I can see PC3 and PC4, but not PC1 which has the doc I want to attach. I have tried using the direct mail address, and using thunderbird or outlook. It doesn't matter, PC1 will not show up.
When I go into File explore on PC2, I can see PC1 and open any file that I want from PC1.