When attempting to configure or modify an existing Tier-0 (T0) gateway, or create a new T0 gateway, the following alarm is generated in the NSX UI.
‘This feature is not supported with the currently applied license. You can only delete existing items, but not edit or add new ones.’
Validate whether a valid license is applied to the NSX Manager under license page:
.
VMware NSX
A valid NSX license must be applied to enable full functionality.