Using the vSphere client, select the Inventory view.
Locate the required virtual machine in the inventory navigation tree on the left. If not shown, select View > Show VMs in Inventory
Click on the virtual machine.
Click on the Connect/disconnect the CD/DVD device of the virtual machine icon in the toolbar.
If already connected to a source, the details are shown and the option to disconnect. Select disconnect and then click the icon again.
From the drop-down, select CD/DVD and then select the appropriate drive letter for the PC drive containing the DVD.
Next Steps
You can now download the ISO to the virtual server using the DVD Primary Server option in the IP Office Web Manager menus. See Downloading the ISO from the primary DVD.