The Revit Plug-in for Vault Professional (server) allows Vault to deeply index Revit family files, including parameters and objects, so that you can search Revit family files with the Revit Vault Add-in.
Revit Interoperability doesn't install with Vault Professional server installation. If you need it, after installing Vault server, exit and install it from [media]\x64\RCE\RevitCoreEngine_20xx.exe. Once you install Revit Interoperability, the Revit Indexing feature must be enabled in the Autodesk Data Management server Console before you can use Revit Family Search.
Enable Revit Indexing with the ADMS Console
You can also select Revit Indexing Service from the Actions menu.
Note: The Vault server starts indexing objects in family files. Depending on the number of family files in the vault, the initial indexing could take some time.
You can now use Revit Family Search on the Load from Vault dialog.