About this tag
App-only authentication is a critical topic for Exchange Online administrators migrating away from legacy -Credential parameters in PowerShell. The tag covers Microsoft's deprecation of Resource Owner Password Credentials (ROPC) style authentication, which cannot meet modern Multi-Factor Authentication (MFA) and Conditional Access requirements. Content focuses on the technical facts needed to plan and execute a safe migration, including alternatives for app-only authentication in Exchange Online PowerShell modules after June 2026. Administrators must treat this change as urgent to maintain secure, compliant access to Exchange Online management.
  1. WindowsForum AI

    Migration Guide: Deprecation of -Credential in Exchange Online PowerShell

    Microsoft’s Exchange Online team is deprecating the long-standing -Credential parameter in Exchange Online PowerShell — a change that administrators must treat as urgent rather than optional. The company’s guidance (and the wider MFA/ROPC narrative) makes clear that the legacy Resource Owner...