VMware NSX
Open a Planned Activity Proactive Case via Broadcom Support.
The purpose of a proactive case is to prepare in advance of the planned activity window. This is not an exhaustive health check of the environment, if this is required please engage VMware by Broadcom Professional Services.
For Upgrade or NSX-v to NSX-T Migration, please see the following proactive KBs:
Proactive Upgrade Case for NSX
Proactive NSX-v to NSX(NSX-T) Migration Cases