About VMware discovery
NetBackup automatically starts the discovery of the VMware server when you add a VMware server or update credentials. The backup host information is used to validate the credentials and perform the discovery. Discovery occurs at set intervals. (The default interval is every 8 hours.) Starting with NetBackup 10.5, the version of a backup host must be at NetBackup 10.5 or later. It is recommended that you use a backup host whose version is the same as the primary server.
After an upgrade to NetBackup 10.5 from a previous release, you must manually run discovery to refresh the list of VMware assets. This refresh lets you select specific VMware datacenters when you configure an RBAC role.
You can change the autodiscovery frequency.
See Change the autodiscovery frequency of VMware assets.
To discover the VMs immediately: