Azure ACS retirement in Microsoft 365
From Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.Schedule dates changed in the text
Date phrases in schedule sentences differ between the versions this installation saw- Seen 12 Apr 2024
April 2nd, 2026→ April 2, 2026
Read from date phrases in Microsoft's text, not from notice metadata. A changed phrase can be a moved rollout, a new milestone or just rewording; "What changed" below shows which.
What the notice says
Microsoft’s text, safely structuredUpdated March 2, 2026: This update serves as a final reminder that Azure ACS in Microsoft 365 will retire and stop working 1 month from now (April 2, 2026).
Since the first use of Azure Access Control Services (ACS) by SharePoint in 2013, Microsoft has evolved the authorization and authentication options for SharePoint Online via Microsoft Entra ID (a.k.a. Azure AD). Using Microsoft Entra ID as auth platform for your SharePoint Online customizations will provide your applications the most secure, compliant and future proof model. With our continued investment in Microsoft Entra ID, Microsoft is retiring the use of Azure ACS as auth platform for SharePoint Online.
Key Points
- Major: Retirement
- Timeline:
- Starting November 1st, 2024, new tenants will not be able use Azure ACS.
- Starting April 2, 2026, Microsoft will remove the ability use SharePoint ACS for existing tenants.
- Action: Review and assess impact
How this will affect your organization
If your organization still uses Azure ACS to grant custom developed or third party applications access to SharePoint Online, they will no longer have access after April 2nd, 2026. We recommend customers to update their customizations to use Microsoft Entra ID and ask their solution vendors to do the same.
What you need to do to prepare
You will want to notify your Azure ACS users and developers. Update your user training and prepare your help desk.
For admins
- Use the Microsoft 365 Assessment tool to scan your tenants for Azure ACS usage.
- Review the guidance for migrating from Azure ACS to Microsoft Entra ID.
- There will not be an option to extend Azure ACS usage for SharePoint Online beyond April 2nd 2026.
Learn more
- Support update for the retirement of Azure ACS for SharePoint Online in Microsoft 365.
What changed
Between archive captures, newest firstUpdated
FebruaryMarch 2, 2026: This update serves as a final reminder that Azure ACS in Microsoft 365 will retire and stop workingin 2 months1 month from now (April 2, 2026). Since the first use of Azure Access …Updated
January 5,February 2, 2026: This update serves as a reminder that Azure ACS in Microsoft 365 will retire and stop working in32 months from now (April 2, 2026). Since the first use of Azure …Updated
October 3, 2025:January 5, 2026: This update serves as a reminder that Azure ACS in Microsoft 365 will retire and stop working in63 months from now (April 2, 2026). Since the first use of Azure …Updated
June 2,October 3, 2025: This update serves as a reminder that Azure ACS in Microsoft 365 will retire and stop working in106 months from now (April 2, 2026). Since the first use of Azure …Updated
February 1,June 2, 2025: This update serves as a reminder that Azure ACS in Microsoft 365 will retire and stop working in1410 months from now (April 2, 2026). Since the first use of Azure …Updated
April 12, 2024:February 1, 2025: This update serves as a reminderregarding the upcoming retirement scheduled for Aprilthat Azure ACS in Microsoft 365 will retire and stop working in 14 months from now (April 2,2026.2026). Since the first use of AzureACS (Access Control Services)Access Control Services (ACS) by SharePoint in 2013, Microsoft has evolved the authorization and authentication options …- Tags
User impact, Admin impact, Retirement→ Updated message, User impact, Admin impact, Retirement
Updated April 12, 2024: This update serves as a reminder regarding the upcoming retirement scheduled for April 2, 2026. Since the first use of Azure ACS (Access Control Services) by SharePoint … retiring the use of Azure ACS as auth platform for SharePoint Online.
[Key Points:]Key Points: Major: Retirement Timeline:Starting November 1st, 2024, new tenants will not be able use Azure ACS. Starting April2nd,2, 2026, Microsoft will remove the ability use SharePoint ACS for existing tenants. Action: Review and assess impact[HowHow this will affect yourorganization]organization If your organization still uses Azure ACS to grant custom developed or … Microsoft Entra ID and ask their solution vendors to do the same.[WhatWhat you need to do toprepare]prepare You will want to notify your Azure ACS users and developers. Update …- Tags
… retiring the use of Azure ACS as auth platform for SharePoint Online.
Key Points:[Key Points:] Major: Retirement Timeline:Starting November 1st, 2024, new tenants will not be able … ability use SharePoint ACS for existing tenants. Action: Review and assess impactHow[How this will affect yourorganizationorganization] If your organization still uses Azure ACS to grant custom developed or … Microsoft Entra ID and ask their solution vendors to do the same.What[What you need to do toprepareprepare] You will want to notify your Azure ACS users and developers. Update …- · first version seen
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