Merge pull request #115007 from cynthn/patch-382

20 concurrent deployments - Update capture-image.md

Author: PRMerger6

articles/virtual-machines/linux/capture-image.md

@@ -13,6 +13,8 @@ ms.custom: legacy
 
 To create multiple copies of a virtual machine (VM) for use in Azure for development and test, capture a managed image of the VM or of the OS VHD. To create, store and share images at scale, see [Shared Image Galleries](../shared-images-cli.md).
 
+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](shared-image-galleries.md) image configured with 1 replica for every 20 concurrent VM deployments.
+
 To create a managed image, you'll need to remove personal account information. In the following steps, you deprovision an existing VM, deallocate it and create an image. You can use this image to create VMs across any resource group within your subscription.
 
 To create a copy of your existing Linux VM for backup or debugging, or to upload a specialized Linux VHD from an on-premises VM, see [Upload and create a Linux VM from custom disk image](upload-vhd.md).