Enter an Azure image family name or image name.

e.g. For the image family
    1. Ubuntu Server 14.04 LTS
    2. Windows Server 2012 Datacenter
    3. Windows Server 2008 R2 SP1

e.g. For the image name
    1. winssh (Custom image name in Azure subscription)

The above examples are provided for reference purpose only and actual values supported by Azure may change at any time.