OneDrive Mobile Apps to End SharePoint Server On-Premises Sign-In Support

🚨 The Signal: OneDrive mobile apps will no longer support SharePoint Server on-premises sign-ins from June 2026. This mandates modern authentication, enhancing security and aligning with modern identity standards and SharePoint Server end-of-life.

The Impact

Organizations with users signing into OneDrive mobile apps with SharePoint Server on-premises accounts will be blocked, posing a risk to mobile file access.

• Users: Will be unable to sign in to OneDrive mobile apps using SharePoint Server on-premises accounts.
• Organizations: Risk disruption to mobile file access if users are not migrated to modern identities.
• IT Security Teams: Must transition to modern authentication for OneDrive mobile access, enabling Conditional Access policies.
• Helpdesk Staff: Will need to support users transitioning to modern identity platforms for OneDrive mobile.

The Action

1. Identify users currently signing into OneDrive mobile apps (iOS/Android) using SharePoint Server on-premises accounts.
2. Migrate identified user identities to Microsoft 365 (work or school) accounts or Microsoft Entra ID (Azure AD) accounts.
3. Plan and execute SharePoint modernization, including migration to SharePoint Online where applicable.
4. Communicate this change and new sign-in requirements to helpdesk staff and end users.
5. Update internal documentation related to OneDrive mobile access and authentication procedures.

Domain: SharePoint · Impact: high · Workload: OneDrive · Essential Eight: Multi-Factor Authentication, Application Control · ISM: ISM-0974, ISM-1568, ISM-1654