When you try to open the SNMP Profile link on the NFA 9.3.3 Administration page after a new install you can get this message:
"Unable to open SNMP profile due HTTP Error 404.3 - Not Found"
Windows 2012 R2
NFA 9.3.x or later
Missing ASP and IIS 6 Compatibility Windows Features
Install ASP and IIS 6 Management Compatibility by following the steps in the NFA Installation Guide Install IIS, ASP, COM+, and SNMP section.