Full scan by manual start from Management Console (Group Command)

Hi everyone

We have install Symantec Endpoint Protection on our server with Windows Server 2012 but we have problem with manual start Scan (Full Scan).

Problem appear then we send group command on Full Scan on all clients (counts of clients - 4) after much many time has passed  (around 10 hours) we saw this (pls see below on screenshot) and attachment:

All clients using Hyper-V (this is VM by working on phisycal host with Windows Server 2012). Why 2 of 4 clients don't complete yet? 

How long time can takes?

Please help resolve this problem.

P.S. All clients and host server using Windows Server 2012.