Improved Select-AzureRmSubscription

Are you managing multiple subscriptions with a single corporate account?

I sometimes work with customers that uses multiple subscriptions in Azure, but uses the same Azure Active Directory, so you can atleast access them all from one account.

I searched the Internet and found this simple way of selecting the subscription from a list:

#Get Azure Subscriptions
{
            $subscriptions = Get-AzureRmSubscription
            $menu = @{}
            for ($i = 1;$i -le $subscriptions.count; $i++) 
            {
                Write-Host -Object "$i. $($subscriptions[$i-1].SubscriptionName)"
                $menu.Add($i,($subscriptions[$i-1].SubscriptionId))
                }
            [int]$ans = Read-Host -Prompt 'Enter selection'
            $subscriptionID = $menu.Item($ans)

            $subscription = Get-AzureRmSubscription -SubscriptionId $subscriptionID
            Set-AzureRmContext -SubscriptionName $subscription.SubscriptionName
            $subName = (Get-AzureRmContext).Subscription.SubscriptionName
}

Adding it to a PS module, and here the selection is the module, but of course the module could be anything.

Function Select-AzureRmSubscription {
 [cmdletbinding()]
Param(
        )
Begin {
        }
Process {
            #Get Azure Subscriptions
            $subscriptions = Get-AzureRmSubscription
            $menu = @{}
            for ($i = 1;$i -le $subscriptions.count; $i++) 
            {
                Write-Host -Object "$i. $($subscriptions[$i-1].SubscriptionName)"
                $menu.Add($i,($subscriptions[$i-1].SubscriptionId))
                }
            [int]$ans = Read-Host -Prompt 'Enter selection'
            $subscriptionID = $menu.Item($ans)
            $subscription = Get-AzureRmSubscription -SubscriptionId $subscriptionID
            Set-AzureRmContext -SubscriptionName $subscription.SubscriptionName
            $subName = (Get-AzureRmContext).Subscription.SubscriptionName
            }
End {
    Write-host "Finished" -ForegroundColor Green
    }
}

To finish it off, I would add Login-AzureRmAccount to the Beginning, but if you only have one account, I wouldn’t like to enter my credentials everytime I want to select a subscription:

Function Select-AzureRmSubscription {
 [cmdletbinding()]
Param(
        )
Begin {
        #Login to the Azure Resource Management Account
        Try {
            Get-AzureRmContext
                } 
            Catch {
                    if ($_ -like "*Login-AzureRmAccount to login*")
                    {
                      Login-AzureRmAccount
                    }
                  }
    }
Process {
            #Get Azure Subscriptions
            $subscriptions = Get-AzureRmSubscription
            $menu = @{}
            for ($i = 1;$i -le $subscriptions.count; $i++) 
            {
                Write-Host -Object "$i. $($subscriptions[$i-1].SubscriptionName)"
                $menu.Add($i,($subscriptions[$i-1].SubscriptionId))
                }
            [int]$ans = Read-Host -Prompt 'Enter selection'
            $subscriptionID = $menu.Item($ans)
            $subscription = Get-AzureRmSubscription -SubscriptionId $subscriptionID
            Set-AzureRmContext -SubscriptionName $subscription.SubscriptionName
            $subName = (Get-AzureRmContext).Subscription.SubscriptionName
            }
End {
    Write-host "Finished" -ForegroundColor Green
    }
}

What it does, is to try Get-AzureRmContext, but unless you are logged in, it will fail and based on that error message, it will make you run Login-AzureRmAccount. If your allready logged in with that PS Session, it will continue to present the subscription you have access in.

Thank you to everyone who shares their knowledge on the Internet.