Connect-ToAzureSubscription

Connect-ToAzureSubscription.ps1

function Connect-ToAzureSubscription {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory = $true, Position = 0)]
        [ValidateNotNullOrEmpty()]
        [guid]$TenantId,

        [Parameter(Mandatory = $true, Position = 1)]
        [ValidateNotNullOrEmpty()]
        [guid]$SubscriptionId,

        [Parameter(Mandatory = $false, Position = 2)]
        [ValidateSet("AzureCloud", "AzureChinaCloud", "AzureUSGovernment")]
        [string]$Environment = "AzureCloud"
    )

    # Check if already connected to the right subscription
    $currentSubscription = (Get-AzContext).Subscription.Id
    if ($currentSubscription -eq $SubscriptionId) {
        Write-Debug "Already connected to the right Azure Context"
        return
    }
    # elseif Is connected to the right tenant but wrong subscription
    elseif ((Get-AzContext).Tenant.Id -eq $TenantId) {
        Write-Debug "Switching to subscription $($SubscriptionId)"
        Set-AzContext -Subscription $SubscriptionId -ErrorAction Stop | Out-Null
    }
    # else Connect to the right tenant and subscription
    else {
        Write-Debug "Connecting to tenant $($TenantId) and subscription $($SubscriptionId)"
        Connect-AzAccount -Tenant $TenantId -Subscription $SubscriptionId -Environment $Environment -ErrorAction Stop | Out-Null
    }

}