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Prathista Ilango's avatar
Prathista Ilango
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Apr 18, 2026

Microsoft Purview PowerShell: Interactive Sign-In Basics + Fixing Common Connect-IPPSSession Errors

If you’re new to Microsoft Purview PowerShell and your interactive sign-in fails when you run Connect-IPPSSession, you’re not alone.

In this post, I’ll walk through the quick setup (module install + connection) and then cover practical fixes for a common authentication failure: “A window handle must be configured” (WAM / MSAL window handle error).

Once connected, you can run Purview-related cmdlets for tasks like working with sensitivity labels, DLP policies, eDiscovery, and other compliance operations (depending on your permissions).

Step 1: Install the Exchange Online PowerShell module

Install-Module ExchangeOnlineManagement
Import-Module ExchangeOnlineManagement

Step 2: Connect to Microsoft Purview (Security & Compliance) PowerShell

For interactive sign-in, you can start with the standard connection pattern below (replace the placeholder with your User Principal Name)

Common issue: Interactive sign-in fails with a WAM “window handle” error

The ExchangeOnlineManagement module uses modern authentication. In some hosts/environments, the sign-in UI can’t attach to a parent window, so token acquisition fails and you may see the error below. This is commonly associated with WAM (Web Account Manager) / MSAL interactive sign-in.

Error Acquiring Token:

A window handle must be configured. See https://aka.ms/msal-net-wam#parent-window-handles

A window handle must be configured. See https://aka.ms/msal-net-wam#parent-window-handles

At C:\Program Files\WindowsPowerShell\Modules\ExchangeOnlineManagement\3.9.2\netFramework\ExchangeOnlineManagement.psm1:591 char:21

+                     throw $_.Exception.InnerException;

+                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : OperationStopped: (:) [], MsalClientException

    + FullyQualifiedErrorId : A window handle must be configured. See https://aka.ms/msal-net-wam#parent-window-handles

 

You’ll often hit this on secured devices, PowerShell ISE, or hardened corporate images. Below are two solutions to bypass this error. Start with the recommended option first.

1. Recommended workaround: Use Get-Credential without disabling WAM

This approach avoids the WAM-based interactive prompt. You’ll be asked for credentials via a standard PowerShell credential dialog, and the module will complete modern authentication.

$cred = Get-Credential
Connect-IPPSSession -Credential $cred

 

  • A credential prompt appears: Enter your username and password.

 

  • After authentication, you should be connected to the Security & Compliance (Microsoft Purview) PowerShell session.
  • As a quick validation, try a lightweight cmdlet such as Get-Label or Get-DlpCompliancePolicy (availability depends on permissions).

If this works in your environment, it’s a simple way to proceed without changing system-wide WAM behavior.

2. Alternative workaround: Disable WAM for the session (use with caution)

If the interactive UI is failing, you can try disabling WAM. Newer versions of the ExchangeOnlineManagement module support a -DisableWAM switch on the connection cmdlets, which bypasses the WAM broker and can avoid the “window handle” failure.

Connect-IPPSSession -UserPrincipalName <yourUPN> -DisableWAM

If you can’t use -DisableWAM or if it is not working as expected (or you’re troubleshooting a specific host issue), some admins set an environment variable to disable WAM for MSAL using the commands below. Treat this as a temporary troubleshooting step and follow your organization’s security guidance.

$env:MSAL_DISABLE_WAM = "1"
setx MSAL_DISABLE_WAM 1

 

Important warning!

  • Changing authentication/broker behavior can have security and supportability implications.
  • Use this only for troubleshooting and revert when you’re done using the following commands.
$env:MSAL_DISABLE_WAM = "0"
setx MSAL_DISABLE_WAM 0

 

Quick summary

If you’re scripting for Microsoft Purview and interactive sign-in fails due to the WAM “window handle” error, try the sequence below.

Install-Module ExchangeOnlineManagement
Import-Module ExchangeOnlineManagement
$cred = Get-Credential
Connect-IPPSSession -Credential $cred

Hope this helps!

 

If you’ve hit this in a specific host (PowerShell ISE vs Windows PowerShell vs PowerShell 7, RDP/jump box, etc.), share what worked for you in the comments.

Thanks for reading. Happy Scripting!


Reference: Connect to Security & Compliance PowerShell | Microsoft Learn

1 Reply

  • GuidovanDijk's avatar
    GuidovanDijk
    MCT
    Apr 21, 2026

    Hi,

    Good write-up for getting people connected to Purview PowerShell quickly.

    One thing I'd push back on though, and I say this constructively, is the assumption that interactive sign-in and WAM workaround are a reasonable starting point, even for someone new to the Purview side of things.

    Anyone working with PowerShell is almost certainly already familiar with Entra ID, app registrations, and modern authentication pattern. The technical bar for setting up app-only authentication with a certificate is not the issue here. The question is really about what we normalise as acceptable practice.

    Using Get-Credential means credentials exist in memory during the session and the connection depends on a licensed user account being available, active, and not blocked. Disabling WAM goes further, WAM is the Windows authentication broker responsible for enforcing Conditional Access policies and handling tokens securely at the OS level. Recommending it be disabled, even with the caution note, is the kind of advice that tends to quietly make its way into runbooks and onboarding docs and stay there long after anyone remembers why.

    In an environment where admin access is a high-value target, these are not small considerations. A compromised admin account or a leaked credential with access to Purview is a serious incident, we're talking DLP Policies, sensitivity labels, eDiscovery. The blast radius is significant.

    The secure pattern, app registration with a certificate, eliminates the credential risk entirely, removes the WAM dependency so the original error never occurs, and produces a clean audit trail that separates automation from human sessions. It is supported and is Microsoft's own recommended approach for scripted scenarios.

    In a world where access attempts and misuse of administrative environment are increasingly common, every entry point matters. If we have the opportunity to guide people towards a more secure foundation from the start, that is worth taking, rather than offering workarounds that chip away at the very controls that are there to protect these environments.