OneDrive error code 0x8004de26

OneDrive Error 0x8004de26

This error typically means:

OneDrive cannot authenticate because the account type or sign-in method is blocked, mismatched, or disabled by your organization.

This indicates that the issue is affecting multiple users, not just a few.

This aligns with causes such as:

• Security Defaults or Conditional Access changes
• License or permission changes in Microsoft 365
• Firewall or network filtering affecting all devices

It’s not an isolated user/device issue, so troubleshooting should focus on tenant settings, policies, and OneDrive client configuration across the environment.

As an admin in a school or EDU Microsoft 365 tenant, here’s a step-by-step action plan to resolve OneDrive error 0x8004de26 across multiple users:

Check User Licenses

(Missing licenses will prevent OneDrive from signing in.)

Review Security Defaults & Conditional Access Policies

(Temporarily disable policies or security defaults for testing to see if users can sign in.)

Check SharePoint & OneDrive Sync Settings

(Make sure “Users can sync files from SharePoint using the OneDrive client” is enabled)

Hope this helps you a little bit.