I have something odd happening to several of our network users recently (not all). Several times a day I'll see the notice in the corner to reconnect to our file server because it is now working "offline". I'm not sure what would prompt this as none of the files it is trying to sync are inaccessible. Clicking OK works fine and it goes away for a couple hours, then kicks you off again. If I reboot my computer and log in, I will have to force myself to connect initially as well. What could be causing the file server to keep kicking us off like this?