In this video, I walk through creating a Service Principal using PowerShell and assigning it the role of Windows Virtual Desktop Owner.  Once created, I use the new Azure AD Application Service Principal to deploy a host pool using the Portal.

### PowerShell used in the video ###

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# RDS and AzureAD modules required
Install-Module Microsoft.RDInfra.RDPowershell
Install-Module AzureAD

# Create a Service Principal
# Create the Context for AzureAD
$aadContext = Connect-AzureAD

# Create the service principle
$svcPrincipal = New-AzureADApplication -AvailableToOtherTenants $true -DisplayName "Windows Virtual Desktop Svc Principal"

# Assign the SP creds to a variable 
$svcPrincipalCreds = New-AzureADApplicationPasswordCredential -ObjectId $svcPrincipal.ObjectId


# View Credentials
# Applicaiton ID
$svcPrincipal.AppId

# Password
$svcPrincipalCreds.Value

# Tenant ID
$aadContext.TenantId.Guid


# Create Role Assignment
# Sign in to WVD
Add-RdsAccount -DeploymentUrl "https://rdbroker.wvd.microsoft.com"

# Assign RDS Owner Role to Tenant
$myTenantName = (Get-RdsTenant).TenantName

New-RdsRoleAssignment -RoleDefinitionName "RDS Owner" -ApplicationId $svcPrincipal.AppId -TenantName $myTenantName

# Verify sign in
$creds = New-Object System.Management.Automation.PSCredential($svcPrincipal.AppId, (ConvertTo-SecureString $svcPrincipalCreds.Value -AsPlainText -Force))

Add-RdsAccount -DeploymentUrl "https://rdbroker.wvd.microsoft.com" -Credential $creds -ServicePrincipal -AadTenantId $aadContext.Tenant.Id.Guid