Local Manager UI:
Global Manager UI:
VMware NSX
This has been identified as an expected behavior where the "Migrate" option gets disabled for NSX local manager nodes.
Initially, a standalone NSX-T Manager, (i.e., not yet federated), provides access to this option. However, once an NSX-T Manager is successfully integrated as a Local Manager within an NSX Federation, the 'Migrate' option is no longer visible or available in its UI.
The "Migrate" option will be available on the Global manager nodes as it will be responsible for global policies and configuration across federated NSX-T sites.
This is an expected behavior. All NSX V to T migration activity will be performed through the Global managers.
For further information, regarding NSX V2T migrations, please refer the administrative guide: Performing NSX V2T migrations