Follow these steps to find the download link.
- Go to the Broadcom support portal.
- Sign in.
- From "My Dashboard - VMware Cloud Foundation", click on "My Downloads" on the left side.

- In the Search box, enter "vSphere".
- Click on "VMware vSphere".
- Click on "VMware vSphere - Standard".
- Click on the appropriate release version.
- On the top, go to "Drivers & Tools".
- Type "Appliance" in the search box and download the version of either the witness appliance or file service appliance required for your environment.
- For vSAN 8.x witness appliance, choose either OSA and ESA as appropriate for the vSAN cluster.
NOTE: 'I agree to Terms and Conditions' needs to be checked for downloads to become available. If the checkbox does not stay checked once clicked - logout and log back into the portal and try again.