Microsoft Teams PowerShell: Web Account Manager (WAM) becomes the default authentication broker

What and Why We are updating the Microsoft Teams PowerShell module to use Web Account Manager (WAM) as the default authentication broker for sign-in. This change improves security and provides a more consistent authentication experience on Windows. A new temporary parameter, -DisableWAM, is available in the Connect-MicrosoftTeams cmdlet, allowing admins to bypass WAM for a single connection if it is not supported in their environment. This change is available starting with preview version 7.8.1 of the Teams PowerShell module. Rollout Schedule General Availability (Worldwide, GCC, GCCH, DoD): Rollout will begin in late June 2026 and is expected to complete in late June 2026. Impact on Your Organization Who is affected Admins using the Microsoft Teams PowerShell module on Windows Platforms/Services Microsoft Teams PowerShell module Windows What will happen Sign-in for the following scenarios will use WAM as the authentication broker:Interactive sign-in using Connect-MicrosoftTeams Connect-MicrosoftTeams with credential (-Credential) Connect-MicrosoftTeams with AccountId (-AccountId, Integrated Windows Authentication) The following sign-in methods are not affected:Service principal with certificate Managed identity Pre-acquired access tokens A temporary -DisableWAM parameter is available to bypass WAM for a single connection. The -DisableWAM parameter will be removed in a future release. Known limitations: On macOS, Linux, and Windows versions earlier than Windows 10 or Windows Server 2019, existing authentication behavior remains unchanged. WAM requires an interactive Windows session with UI access. WAM will not work in non-interactive scenarios such as Windows services, scheduled tasks without a logged-in user, or scenarios that run under impersonation. Action Required / Recommendations Review any scripts that use the Teams PowerShell module, especially those running in non-interactive environments. Update scripts if needed to support WAM authentication. Use the -DisableWAM parameter as a temporary workaround if required. Learn more: Connect-MicrosoftTeams | Microsoft Teams | Microsoft Learn Compliance considerations No compliance considerations identified. Review as appropriate for your organization.