Summary
Table of Contents
- OneDrive mobile apps (iOS and Android) will block sign-ins that use SharePoint Server on-premises accounts; personal Microsoft accounts and Microsoft 365/Entra accounts are unaffected.
- Affected users: anyone signing into OneDrive mobile with SharePoint Server (on-premises 2016/2019) credentials; admins managing identity/SharePoint Server environments need to act.
- Recommended admin actions: identify affected users/devices, migrate identities to Microsoft Entra ID/Microsoft 365 (or migrate content to SharePoint Online), and update helpdesk documentation and user communications.
- Security/compliance impact: mobile access will require modern authentication and enables enforcement of Conditional Access via Entra ID; legacy on-premises authentication will no longer work for OneDrive mobile.
Primary Service: OneDrive
Admin Impact: High
User Impact: High
Release Start: 01 Jun 2026
Release End: 30 Jun 2026
Services: Entra, OneDrive, Server, SharePoint
Category: Plan for change
Tags: Admin Action, User Adoption
History
6/2/2026 Item Added to Message Center
Microsoft Message
What and Why
To strengthen security and align with modern identity standards, OneDrive for iOS and Android will no longer support sign-ins using SharePoint Server on‑premises accounts. This change reflects Microsoft’s continued investment in enterprise-ready security, ensuring mobile access to files is protected by modern authentication, conditional access, and ongoing security updates. Personal Microsoft accounts and Microsoft 365 work or school accounts are not affected.
This update also aligns with the upcoming end of support for SharePoint Server 2016 and 2019 on July 14, 2026, helping organizations transition to supported, secure platforms.
Rollout Schedule
General Availability (Worldwide): Rollout begins in early June 2026 and is expected to complete by late June 2026.
Impact on Your Organization
Who is affected:
Organizations with users who sign in to OneDrive mobile apps (iOS or Android) using SharePoint Server on‑premises accounts.
Platforms/Services:
- OneDrive for iOS
- OneDrive for Android
- SharePoint Server on‑premises (2016, 2019)
What will happen
- OneDrive mobile apps will block sign-in using SharePoint Server on‑premises credentials.
- Users must sign in with a modern identity:
- Microsoft 365 (work or school) account
- Microsoft Entra ID (Azure AD) account
- Personal Microsoft accounts and existing Microsoft 365 sign-ins are unaffected.
Action Required / Recommendations
- Identify users using OneDrive mobile with on‑premises accounts.
- Migrate identities to Microsoft 365 or Microsoft Entra ID.
- Plan SharePoint modernization, including migration to SharePoint Online where applicable.
- Communicate this change to helpdesk staff and end users.
- Update internal documentation related to OneDrive mobile access.
Compliance considerations
Compliance area: Conditional Access policies
Explanation: OneDrive mobile sign-in now requires Microsoft Entra ID, enabling enforcement of Conditional Access policies that are not available with on‑premises authentication.
Compliance area: Authentication and access controls
Explanation:Legacy on‑premises authentication is disabled for OneDrive mobile, shifting access control to modern identity platforms.