MC1184649 | Microsoft SharePoint: Retirement of IDCRL authentication protocol and enforcement of OpenID Connect and OAuth protocols

Service

SharePoint Online, Microsoft OneDrive

Last Updated

2026-05-13T16:35:51.2Z

Published

2025-11-11T00:37:53Z

Message ID

MC1184649

Updated May 13, 2026: We have initiated the deprecation rollout and expect to reach 100% production coverage in the next few weeks. We strongly recommend that customers transition to modern authentication at the earliest opportunity. Thank you for your patience. [Introduction:] As part of the Microsoft Secure Future Initiative (SFI) and in alignment with the “Secure by Default” principle, we’re retiring the legacy IDCRL (Identity Client Run Time Library) authentication protocol in SharePoint Online and OneDrive for Business. This change helps strengthen your organization’s security posture by enforcing modern authentication standards—OpenID Connect and OAuth—which reduce exposure to outdated...

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