Service Permission errors while creating & assigning the scaling plan to hostpool via ARM Template

Question

Getting the below error while creating & assigning the scaling plan to hostpool via ARM Template

New-AzResourceGroupDeployment : 23:27:51 - The deployment 'HostPool' failed with error(s). Showing 1 out of 1 error(s).
Status Message: ActivityId: 9876398c-2590-4ef3-8b3d-ddfe2f446ddb Error: ≤{"error":{"code":"BadRequest","message":"unable to access host pool with resource id
'AVDPHOSTPOOL-1', please make sure that you have given the Azure Virtual Desktop service permissions to access your resource (https://docs.microsoft.com/en-us/azu
re/virtual-desktop/autoscale-scaling-plan#create-a-custom-rbac-role)","target":"/api/scalingPlans/subscriptions/39ee65b9-0633-492d-a68c-c1cbdead1ff3/resourceGroups/AVDPRG-1/scalingPlans/AVDPSCALPLAN-1"}}≥ (Code:400)
CorrelationId: 40c66cb1-3a16-4516-bcc8-808ef51602e1
At line:1 char:1
+ New-AzResourceGroupDeployment -ResourceGroupName "AVDPRG-1" -Templ ...

I am found few article to create custom role for AVD via Powershell. but i am trying to achieve it via ARM template.

Is there a way i can add the custom role permission in the scaling plan ARM template .

Link : https://docs.microsoft.com/en-us/azure/templates/microsoft.desktopvirtualization/scalingplans?tabs=json

yanbo_zhu · Answer

resitservices&nbsp;I had the same issue.There should be one enterprise app called "Windows Virtual Desktop", I assigned&nbsp;Desktop Virtualization Power On Off Contributor to&nbsp;"Windows Virtual Desktop" on the resource level (same resource as your host pool) and it worked for me.Hope this helps.&nbsp;

resitservices · Answer

Thank you heaps, you gave me the clue that I was looking for. In my case the app is called "Azure Virtual Desktop" and the end I found the proper documentation here: https://learn.microsoft.com/en-us/azure/virtual-desktop/service-principal-assign-roles?tabs=portalThank you Yanbo, I hope this threat helps more people.

fliehigh · Answer

Spoiler (Highlight to read)&nbsp;&nbsp;BalajiRanganathan354&nbsp;Did you ever get this fixed? I am encountering the same error.

am549 · Answer

Fliehigh&nbsp;the avd application requires desktop power on off role on the host pool resource group as well as the resource group containing the session hosts.Once adding this in it works fine

joshua_matthews · Answer

Am549&nbsp; can you provide some more details here? I am stuck on same error.&nbsp;How do grant AVD roles on the host pool?

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Service Permission errors while creating & assigning the scaling plan to hostpool via ARM Template

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