We have a Windows File Server, but clients are macs. Sharing works fine in the office, but when a user is remote and connected by VPN, it's very slow to work with the files on the file server. VPN solution we have is Sonicwall SSL-VPN. Windows clients that connect over the VPN have no speed issues.
So my question is, what would be the best/fastest protocol for the remote Mac users to use? SMB, AFP, WebDAV,Samba???
Client OS's are pretty up to date. All at least have Yosemite or later. Windows file server is a hyper-v instance of Windows Server 2012