I wonder if anyone can help out here. We have three iMacs running on a Windows domain network. The access/file system on that network was recently changed to use DFS. Since then we have had various issues with the iMacs accessing their data. Mappings are slow or disconnect, files don't open. Eventually after some research we installed some software called DAVE which replaces the Apple networking software. We now have another odd problem. We are mapping the DFS shares via Connect to a Server like this: smb://domain.name/dfs.share as per: https://support.apple.com/en-us/HT4794 On two (OSX 10.9.5 and 10.10.x) of the three Macs if you look at a folders properties, it has changed the link to: cifs://server.name/share The third Mac (OS X 10.9.5) shows the folder mapping the same as originally typed. This causes issues with documents that have links in as they all fail - the software they use appears to hard code the links. Any ideas why this smb to cifs change is happening on two machines and what the cause is?