AVD Deployment Operation Failed | Add New VMs to Existing Host Pool

In this post, we will see AVD Deployment Operation Failed errors. We have already learned how to add new session hosts to the existing host pool (AVD). Here is the document to help to Add New Personal VMs to Existing Host Pool | WVD v1 2019 Release.

This post is applicable only for the Azure Virtual Desktop spring 2020 release (a.k.a AVD v2). The Spring 2020 update uses the Azure Resource Manager (ARM) Azure Virtual Desktop objects.

Host sessions are nothing but virtual machines part of the host pool. I’m planning to add new two-session hosts to host pools using Azure Virtual Desktop’s new experience (a.k.a AVD).

Patch My PC

NOTE! – Learn more about AVD v2 ARM model architecture.

Add Session Hosts to AVD Host Pool

Let’s understand how to add session hosts or VMs to AVD Host Pool.

AVD v2 Deployment Operation Failed
AVD v2 Deployment Operation Failed

Click on Generate New Key

1E Nomad
AVD Deployment Operation Failed
AVD Deployment Operation Failed

Set expiry for the key

AVD Deployment Operation Failed
AVD Deployment Operation Failed

Once the Registration Key is generated, click on the X symbol as shown in the following picture.

Deployment Operation Failed
WVD Deployment Operation Failed

Click on Add

AVD Deployment Operation Failed | Add New VMs to Existing Host Pool 1
AVD Deployment Operation Failed

Click on the Next button to continue

Change the validation environment option from Yes to NO if you are deploying AVD VM to production users.

NOTE! – Most of the entries are automatically populated or inherited from the existing host pool configuration. You don’t have any option to change those entries.

WVD v2 Deployment Operation Failed
AVD v2 Deployment Operation Failed

Virtual Machine Configuration for AVD

You have the option to change the following three things that you will need to take care.

Resource Group

Virtual Machine Location

Number of VMs

NOTE! – None of the other options are editable. Those are inherited automatically from host pool setting.

Deployment Operation Failed
Deployment Operation Failed

Network & Security

  • Select a Virtual networks – Those are logically isolated from each other in Azure. You can configure their IP address ranges, subnets, route tables, gateways, and security settings, much like a traditional network in your data center. Virtual machines in the same virtual network can access each other by default.
  • Select A subnet. This is a range of IP addresses in your virtual network, which can be used to isolate virtual machines from each other or from the Internet.
  • Public IP = NO
  • Select Network Security Group = Basic
  • Public inbound ports = NO
Deployment Operation Failed
Deployment Operation Failed

Domain Join Options

  • Enter the Full Domain FQDN – Full domain name of the Active Directory Domain to which session host VMs are going to be joined. For example, “contoso.com” or “site1.contoso.com”.
  • Enter the OU path where VMs should be located in on-prem active directory?
  • Enter the details of the administrative account – This account must have access to join a device to the domain and the OU which you mentioned above.
  • Click on Next Tags to continue.
AVD Deployment Operation Failed | Add New VMs to Existing Host Pool 2
AVD Deployment Operation Failed | Add New VMs to Existing Host Pool 13
  • Click on Review + Create after reviewing the configuration.
AVD Deployment Operation Failed | Add New VMs to Existing Host Pool 3
AVD v2 Deployment Operation Failed
  • Once Validation is passed, you can click on Create option.

AVD Deployment Progress

Let’s wait until the AVD session host addition process finishes.

WVD v2 Deployment Operation Failed
AVD v2 Deployment Operation Failed

Results Deployment Operation Failed – AVD Deployment Failed

My deployment failed because of the following error. But if you have enough free IPs left in your subnet then there should not be an issue.

The resource operation is completed with terminal provisioning state ‘Failed’. Click here for details- Your deployment failed

Subnet default with address prefix 20.225.108.0/27 does not have enough capacity for 1 IP!

{"code":"DeploymentFailed","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.","details":[{"code":"Conflict","message":"{\r\n \"status\": \"Failed\",\r\n \"error\": {\r\n \"code\": \"ResourceDeploymentFailure\",\r\n \"message\": \"The resource operation completed with terminal provisioning state 'Failed'.\",\r\n \"details\": [\r\n {\r\n \"code\": \"DeploymentFailed\",\r\n \"message\": \"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.\",\r\n \"details\": [\r\n {\r\n \"code\": \"BadRequest\",\r\n \"message\": \"{\\r\\n \\\"error\\\": {\\r\\n \\\"code\\\": \\\"SubnetIsFull\\\",\\r\\n \\\"message\\\": \\\"Subnet default with address prefix 20.225.108.0/27 does not have enough capacity for 1 IP addresses.\\\",\\r\\n \\\"details\\\": []\\r\\n }\\r\\n}\"\r\n }\r\n ]\r\n }\r\n ]\r\n }\r\n}"}]}

NOTE! – I think AVD v1 was better in these terms (availability of IPs). It won’t allow you to select subnet if you don’t have free IPs available in the subnet.

 Results Deployment Operation Failed - AVD Deployment Failed
Results Deployment Operation Failed – AVD Deployment Failed

FIX to AVD Deployment Operation Failed

Free up IPs if that is possible from the subnet (for test environments).

Use a different subnet where IPs are available

Repeat the steps mentioned above or try AVD Add New Session Hosts to Existing Host Pool | Registration Key

Resources

Author

Anoop is Microsoft MVP! He is a Solution Architect on enterprise client management with more than 20 years of experience (calculation done in 2021) in IT. He is Blogger, Speaker, and Local User Group HTMD Community leader. His main focus is on Device Management technologies like SCCM 2012, Current Branch, Intune. He writes about technologies like ConfigMgr, Windows 11, Windows 10, Azure AD, Microsoft Intune, Windows 365, AVD, etc.…

Categories AVD

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