Sage 100 Standard 2015 and 2016 editions on 2012R2 server extreme slowness with more than one user

SOLVED

How do we resolve this issue?  I have clients I need to upgrade and how can I suggest we use a 2008 server operating system.  Last year when I upgraded internally to 2015 edition, Sage support was not able to help resolve the slowness.  We were forced to move the install to a 2008 server.  I have just tested the Sage 100 2016 edition on a 2012R2 server and we are seeing the same issue.  I am having out IT staff review the article on settings for the NIC card.  Any other suggestions on what to review?  The 2012 server settings for Opportunistic Locking are not the same as older systems and is not the answer.