So i have been trying to figure out this issue i'm having with ManageEngine in where i cannot see about 20 machines in my environment. They are live and active because i use another scanner and it picks them up no problem. I tried doing network scan, thinking that maybe my domain scan is just messed up but that is not the case. When i do a Network scan i get 0 feedback and says all 255 machines are unresponsive, which once again is false considering i use Alienvault which works perfectly fine in the same environment. 

Hope someone can help me find a solution!

Thanks,

-Mark