Follow these best practices to mitigate performance issues when running the Apex One/OfficeScan client on a VDI environment:

1. Use Trend Micro Virtual Support, which is available as a plug-in. This feature prohibits clients from performing on-demand/scheduled scan or component updates simultaneously, optimizing I/O on virtual hosts.

   

   Create golden images for Apex One/OfficeScan client installation after installing the Virtual Desktop Support on the Apex One/OfficeScan server. Refer to this article: Configuring the Apex One/OfficeScan Virtual Desktop Infrastructure (VDI) client.

2. Adjust the maximum number of Apex One/OfficeScan clients for simultaneous on-demand/scheduled scan or component updates. Follow this article: Controlling the performance of the Virtual Desktop Infrastructure (VDI) environment.
3. These services can affect overall performance. It is advised to disable them:
   • Disable Unauthorized Change Prevention Service:
     • Behavior Monitoring
     • Device Control
     • Client Self Protection
   • Disable Firewall Service.

     

   • Disable Suspicious Object Synchronization.
4. Upgrade Apex One/OfficeScan to the latest version.

   It enhances client management on non-persistent desktops, prohibiting duplicated clients from appearing on the client management tree.

   Virtual Desktop Support enhances the performance of smart scan component updates on a VDI environment.

5. Select Smart Scan as Scan Method. Smart Scan update performance on a VDI environment has been enhanced on these versions.

   

6. Disable digital signature cache and enable on-demand cache.

   Enabling both of them can affect performance on a VDI environment.

   

7. Disable Scheduled Scan if Virtual Desktop Support is not used.

   Simultaneous scanning on several guest OS will lead to a performance drop on the host machine.

8. Avoid changing the Apex One/OfficeScan settings on a root domain or domains with multiple clients.

   For example, do not switch between Conventional Scan and Smart Scan on a VDI environment at those domains.

   A scan type change will immediately trigger a full pattern update on a guest environment, causing disk I/O congestion.

9. Recreate the golden/master VM image with the latest Apex One/OfficeScan pattern components when deploying non-persistent desktops within 14 days after creating the image.

   Apex One/OfficeScan clients won't be able to update incremental components, affecting performance on virtual hosts.