Intro

How to create an Azure custom image

Documentation

• Prepare a Windows VHD or VHDX to upload to Azure - Lots of good stuff here on sysprep, disabling Windows updates, minimum network services that need to be running, etc

• How to create a virtual machine using your own image

• Prepare and customize a master VHD image

• Create a managed image of a generalized VM in Azure
  

Tips and Tidbits

• One managed image supports up to 20 simultaneous deployments.

  • Attempting to create more than 20 VMs concurrently, from the same managed image, may result in provisioning timeouts due to the storage performance limitations of a single VHD.

  • To create more than 20 VMs concurrently, use a Shared Image Galleries image configured with 1 replica for every 20 concurrent VM deployments.