prereq updates

Author: sipastak

azure-local/manage/virtual-machine-image-azure-compute-gallery.md

@@ -22,9 +22,8 @@ Before you begin, make sure that the following prerequisites are completed.
 
 - Make sure to review and [complete the prerequisites](./azure-arc-vm-management-prerequisites.md).
 - Make sure that your image is using a [supported operating system](/azure/azure-arc/servers/prerequisites#supported-operating-systems).
-    - For custom images in Azure Storage account, you have the following extra prerequisites:
-    - You should have a VHD loaded in your Azure Storage account. See how to [Upload a VHD image in your Azure Storage account](/azure/databox-online/azure-stack-edge-gpu-create-virtual-machine-image#copy-vhd-to-storage-account-using-azcopy).
-    - Make sure that you're uploading your VHD or VHDX as a page blob image into the Storage account. Only page blob images are supported to create VM images via the Storage account.
+    - For custom images in Azure Compute Gallery, you have the following extra prerequisites:
+    - You should have a VHD loaded in your Azure Compute Gallery. See how to [Create an image definition and image version](/azure/virtual-machines/image-version).
     - If using a VHDX:
         - The VHDX image must be Gen 2 type and secure boot enabled.
         - The VHDX image must be prepared using `sysprep /generalize /shutdown /oobe`. For more information, see [Sysprep command-line options](/windows-hardware/manufacture/desktop/sysprep-command-line-options).