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Microsoft Mission Critical Blog
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Legacy SharePoint Authentication (IDCRL) Is Retiring — What to Do Before May 1, 2026

mikeleemsft's avatar
mikeleemsft
Icon for Microsoft rankMicrosoft
Mar 03, 2026

This post explains what’s changing, how to detect legacy sign-ins, and the practical steps to move to modern authentication (OAuth) before the cutoff dates.

Audience: SharePoint admins, M365 admins, and anyone running automations that access SharePoint Online/OneDrive. This post explains what’s changing, how to detect legacy sign-ins, and the practical s...
Published Mar 03, 2026
Version 1.0
mw365
pgodwin's avatar
pgodwin
Copper Contributor
Apr 26, 2026

Does this affect SOAP API consumers who were using federated logins?

  • pgodwin's avatar
    pgodwin
    Copper Contributor
    Apr 26, 2026

    Answering my own question, it does as SOAP calls do not support OAuth.
    This announcement technically means that the SOAP API is no longer available on Sharepoint online for API consumers!?