Why is my OSX client having so much trouble connecting to our SMB server?
I'm having the exact same problem on my client.  Looking at a WireShark trace, there is always a 45 second delay in opening the connection the the file share (OSX Server 3.1.2).  Using SMB1 (CIFS) does the same thing and WireShark confirms SMB vs. SMB2.  Any other ideas out there?