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SPFx MSAL V4 SSO Redirect Overview

Sep 15, 2025

Summary

  • The meeting focused on the use and implementation details for the SPFx MSAL V4 Single Sign On (SSO) Redirect Page. Participants reviewed the redirect URL and discussed its role within the authentication process for SharePoint Framework (SPFx) solutions. Next steps for integration and deployment were outlined.

Action Items

  • Greg: Publish documentation on the SSO redirect implementation and share with the team.
  • Zack: Validate the redirect URL within the SPFx solution and communicate any issues to the group.

SSO Redirect Page Overview and Implementation

  • The purpose and structure of the SPFx MSAL V4 Single Sign On Redirect Page (/spfxsinglesignon.aspx) were reviewed.
  • Confirmed the page is hosted on SharePoint Online and is integral to enabling SSO for SPFx web parts using MSAL V4.
  • Discussed technical requirements for configuring MSAL V4 with the provided redirect URL.
  • Outlined steps for including the redirect page in the authentication workflow.

Integration and Next Steps

  • Team members will individually test integration of the redirect page in their SPFx solutions before the next check-in.
  • Identified the need to update or publish internal documentation to reflect this authentication workflow for new and existing SPFx projects.

Decisions

  • Use of /spfxsinglesignon.aspx as the standard SSO redirect page — Chosen for alignment with current SharePoint authentication requirements and compatibility with MSAL V4.

Open Questions / Follow-Ups

  • Are there any environment-specific issues when deploying the redirect page in tenant-locked or restricted SharePoint sites?
  • Is further user training required for team members implementing SSO with MSAL V4?

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