Many users are encountering a frustrating issue when trying to sign in to Microsoft OneDrive or SharePoint, receiving a message that reads:
“Something went wrong. We couldn’t sign you in. If this error persists, contact your system administrator and provide the error code CAA2000B.”
This error can disrupt access to important documents and collaborative tools, especially in workplace environments. Here’s what it means and how to resolve it.
What Does Error Code CAA2000B Mean?
The technical details often show the following:
- Error Code: CAA2000B
- Server Message: AADSTS500014
- Cause: The service principal for SharePoint or OneDrive is disabled.
In simple terms, OneDrive or SharePoint is trying to connect to Microsoft 365 services, but something in your organization’s settings is blocking it.
Common Causes of This Error
- Expired or Canceled Microsoft 365 Subscription: Services like SharePoint may be automatically disabled.
- Disabled Service Principal in Azure Active Directory: If disabled, sign-in tokens won’t be issued.
- Misconfiguration by Admin: An admin might have disabled app access unintentionally.
How to Fix It
If You’re a Regular User
Contact your IT administrator or Microsoft 365 admin and provide them with the following:
- Error code:
CAA2000B - Server message:
AADSTS500014 - URL or app affected: e.g.
johneliaslaw-my.sharepoint.com
If You’re the Administrator
- Check the Microsoft 365 Subscription:
Log in to admin.microsoft.com and go to Billing > Your products to confirm everything is active. - Re-enable the Service Principal:
Log in to Azure Portal, then go to Azure Active Directory > Enterprise Applications and ensure SharePoint or OneDrive is enabled. - Reset OneDrive (if needed):
Open the Run dialog and enter:
%localappdata%\Microsoft\OneDrive\onedrive.exe /reset
Why This Matters
Organizations like law firms, schools, and businesses rely heavily on Microsoft 365. An error like this can interrupt critical workflows and team collaboration. Fast resolution ensures minimal downtime and better productivity.
Conclusion
The CAA2000B error is usually due to expired licenses or misconfigurations in Azure AD. Both users and admins can play a role in identifying and resolving the issue quickly. Keeping your Microsoft 365 environment properly licensed and maintained is key to avoiding this disruption.