Siva Posted 24 Sep 2019 13:49
  
1.Check the CPU & Memory usage of the VM.
2.Check if you have any kind of Bandwidth Management.
3.If current VM has joined a domain, try create another VM without a domain to identify is it affected by Domain Policy.
Siva Posted 25 Sep 2019 10:46
  
In that case i think it's better to contact Sangfor Support to have the engineers to look into this issue