# Enabling Optimized Scan for Virtual Machines

You can enable optimized scan for Windows source VMs using the ServiceEnabledForOptimizedVSAScan additional setting. Optimized scan should be enabled for VMs that have a large number of files (that is, millions) to be indexed.

## Before You Begin

- Ensure that the VM name and the client name are the same.

- To generate snapshots on the source VM client, each volume must have at least 1 GB of free storage for every 1 million items.

## Procedure

1. Install the file system core or file system agent on the client computer.

2. On the VM, add the ServiceEnabledForOptimizedVSAScan additional setting. For information about adding an additional setting to a VM, see Settings for VM Groups.

3. Restart services on the client computer.

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