Microsoft Axes Insecure -Credential Parameter in Exchange Online PowerShell – MFA Push Incoming!
Big security update from Microsoft: The -Credential parameter in Exchange Online PowerShell is getting deprecated after June 2026 because it relies on outdated ROPC auth that skips MFA and Conditional Access. Reasons include aligning with modern security standards and MSAL's deprecation of ROPC. Timeline: It works in current versions, but new ones post-June won't support it. Alternatives for admins include interactive sign-in for manual use, app-only auth for external automation, and managed identities for Azure-based scripts. Time to migrate now to avoid disruptions!
Microsoft is phasing out the -Credential parameter in Exchange Online PowerShell due to its reliance on the legacy Resource Owner Password Credentials (ROPC) authentication flow, which does not support multi-factor authentication (MFA). This change aligns with Microsoft's commitment to enhance security across its cloud services. Support for the -Credential parameter will be discontinued in new Exchange Online PowerShell versions released after June 2026, though it will remain functional until then. Microsoft recommends transitioning to alternative authentication methods, such as Interactive Sign-In for human administrators, App-Only Authentication for non-interactive automation, and Managed Identity Authentication for Azure services.
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