I'm using autofs mounting of a samba share from a Windows 10 (Creators edition).
Microsoft patched its OS to no longer accept smb version 1.0 sometimes in 2017.
See Mount CIFS Host is down for more information on the problem and solution.
After a while it finishes negociating (half an hour?) and then keeps working fine.
How do I do
-o vers=2.0 with autofs?