Retrieve Azure Service Bus Shared Access Connection String via Powershell - powershell

Question

It's possible to retrieve the access key to an Azure storage account using Get-AzureRmStorageAccountKey from Powershell. How would I get hold of the access key to a shared access policy of an Azure Service Bus?
More clarification
This is what I get when I use the Get-AzureRmServiceBusNamespaceKey cmdlet:
PS C:\Windows\system32> Login-AzureRmAccount -Credential $cred
Environment : AzureCloud
Account : ***redacted***
TenantId : ***redacted***
SubscriptionId : ***redacted***
CurrentStorageAccount :
PS C:\Windows\system32> Set-AzureRmContext -SubscriptionId ***redacted***
Environment : AzureCloud
Account : ***redacted***
TenantId : ***redacted***
SubscriptionId : ***redacted***
CurrentStorageAccount :
PS C:\Windows\system32> Get-AzureRmServiceBusNamespaceKey -ResourceGroup testresourcegroup -Name test-bus -AuthorizationRuleName SendPolicy
Get-AzureRmServiceBusNamespaceKey : Run Login-AzureRmAccount to login.
At line:1 char:1
+ Get-AzureRmServiceBusNamespaceKey -ResourceGroup testresourcegroup -Name test-bus ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [Get-AzureRmServiceBusNamespaceKey], PSInvalidOperationException
+ FullyQualifiedErrorId : InvalidOperation,Microsoft.Azure.Commands.ServiceBus.Commands.Namespace.GetAzure RmServiceBusNamespaceKey
PS C:\Windows\system32> Get-AzureRmStorageAccountKey -ResourceGroupName testresourcegroup -Name teststoragexxx
Key1 Key2
---- ----
***redacted*** ***redacted***

Answer 1

Not with Get-AzureRmStorageAccountKey, but you can use Get-AzureRmServiceBusNamespaceKey
$resourceGroup = "myResourceGroup"
$serviceBusName ="myservicebusname"
$policyName = "policyname"
Get-AzureRmServiceBusNamespaceKey -ResourceGroup $resourceGroup -Name
$serviceBusName -AuthorizationRuleName $policyName
This will return the whole object, so you can pass it into a variable and get the keys or connection strings from that.

Answer 2

Please have a try to login with tenantId and ServicePrincipal. I do a demo test about that, it works correctly for me.
Login-AzureRmAccount -Credential $psCred -TenantId $azureTenantId  -ServicePrincipal -SubscriptionId $subscriptionId
The following is may detail steps.
1 . We need to install service Bus module if it is not install. More detail info about AzureRM.ServiceBus please refer to document.
Install-Module -Name AzureRM.ServiceBus
2.More detail info about Automatically login script please refer to another SO thread.
3.Run the test script and check the result.
$azureAplicationId ="Azure AD Application Id"
$azureTenantId= "Your Tenant Id"
$azurePassword = ConvertTo-SecureString "strong password" -AsPlainText -Force
$subscriptionId="Your subcription"
$psCred = New-Object System.Management.Automation.PSCredential($azureAplicationId , $azurePassword)
Login-AzureRmAccount -Credential $psCred -TenantId $azureTenantId  -ServicePrincipal -SubscriptionId $subscriptionId
$resourceGroup = "Resource Group name"
$serviceBusName ="Service Bus Name"
$policyName = "Policy Name"
Get-AzureRmServiceBusNamespaceKey -ResourceGroup $resourceGroup -Name $serviceBusName -AuthorizationRuleName $policyName