On the Global Settings page of QuickFinder Server Manager, click Manage and select a virtual search server from the list.

Under Settings, click Synchronization.

Under Send Settings, click Yes next to Let virtual search server send cluster data.

Click Edit next to the Under name of clusters to send to field.

Select one or more clusters that you have defined, then click Apply.

Select one or more indexes from Indexes to send to clusters.

The indexes you select are sent to the designated clusters every time they are regenerated (manually or scheduled). Also, you can click the Indexes button under the Send indexes section to send these indexes immediately to the clusters you've selected.

Click Apply Settings.