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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
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mw365
Isabel_Aguilar's avatar
Isabel_Aguilar
Copper Contributor
Apr 15, 2026

Hello, from a user's standpoint, will this any of our CRM created applications, or PowerApps?

 

mikeleemsft's avatar
mikeleemsft
Icon for Microsoft rankMicrosoft
Apr 15, 2026

Isabel_Aguilar​  It is possible that CRM and PowerApps would be affected. If these apps are authenticating with a username and password, it will trigger IDCRL.