How to detect if Azure Powershell session has expired?

Azure RM but this will check if there is an active account otherwise throw up a prompt.

if ([string]::IsNullOrEmpty($(Get-AzureRmContext).Account)) {Login-AzureRmAccount}

Cheers

You need to run Get-AzureRmContext and check if the Account property is populated. In the latest version of AzureRM, Get-AzureRmContext doesn't raise error (the error is raised by cmdlets that require active session). However, apparently in some other versions it does.

This works for me:

function Login{    $needLogin = $true    Try     {        $content = Get-AzureRmContext        if ($content)         {            $needLogin = ([string]::IsNullOrEmpty($content.Account))        }     }     Catch     {        if ($_ -like "*Login-AzureRmAccount to login*")         {            $needLogin = $true        }         else         {            throw        }    }    if ($needLogin)    {        Login-AzureRmAccount    }}

If you are using the new Azure PowerShell API, it's much simpler

function Login($SubscriptionId){    $context = Get-AzContext    if (!$context -or ($context.Subscription.Id -ne $SubscriptionId))     {        Connect-AzAccount -Subscription $SubscriptionId    }     else     {        Write-Host "SubscriptionId '$SubscriptionId' already connected"    }}

I'd make it a little simpler than what Peter proposed. Just insert these lines somewhere at the beginning of your script:

Try {  Get-AzureRmContext} Catch {  if ($_ -like "*Login-AzureRmAccount to login*") {    Login-AzureRmAccount  }}

Cheers,