Can't open your link from here - office filters seem to think blogspot.com.es is a dangerous site...also sorry to throw this link in to it, this is what i was following for the teaming
Server 720 - Server 2012 Blog: SMB 3.0 Multipath over Nic Team in Windows Server 2012 seems to use lacp etc.
I'll look at it from home tonight, but I've never seen any use of LACP or other forms of teaming required for SMB multipath.
Also don't know why having multiple interfaces seems to stop you from accessing the server. Very odd. It is a common and usually trouble-free configuration.