The customer is given the option to enable SSH to the NSX Manager during the NSX manager appliance deployment. However, if it is not configured at the time and SSH to the NSX managers is needed, this document has been created to assist with enabling SSH.
VMware NSX-T Data Center
VMware NSX
start service ssh
set service ssh start-on-boot
get service ssh
Note: Run those Commands as admin, not as root
Reference on how to Enable SSH access to NSX Edge Nodes
Reference on how to Enable ssh root access for NSX appliances