ExtendSync for Outlook authenticates with NetSuite using NetSuite’s secure Three-Step Authorization (3SA) process.
If your NetSuite role is missing required permissions, NetSuite will block authentication and return a Missing Authentication Token error.
Error
If your role is missing required permissions, you may see this error:
"message": "Missing Authentication Token",
"type": "MISSING_AUTHENTICATION_TOKEN",
"statusCode": 404,
"hint": "The HTTP method or resource may not be supported."
Why This Error Happens
This error occurs when the NetSuite role selected during login does not have the permissions required for ExtendSync to:
Authenticate using Token-Based Authentication
Communicate with NetSuite via API
NetSuite enforces role-based access control, so missing permissions will immediately block authentication.
Resolution
Please contact your NetSuite Administrator and request the following updates to your role:
Log in to NetSuite as an Administrator.
Navigate to:
Setup → Users/Roles → Manage RolesLocate the role used by the affected user and click Edit or Customize.
Open the Permissions subtab.
Go to the Setup section.
Add the following permissions and set each to Full:
SOAP Web Services
User Access Tokens
Log in using Access Tokens
Click Save.
⚠️ If users can select multiple roles when logging in, ensure these permissions are added to every role they may use with ExtendSync.
Final Step for Users
After the role permissions are updated:
Close Outlook completely.
Reopen Outlook.
Launch ExtendSync.
Log in again and select the updated role.
The error should no longer appear.
Why These Permissions Matter
ExtendSync uses NetSuite’s secure token-based 3-Step Authorization (3SA), which fully supports:
Multi-Factor Authentication (MFA)
Single Sign-On (SSO)
Any SAML-based Identity Provider, including Azure AD, Google, and Okta
This modern authentication flow ensures strong protection of your NetSuite data.
Ultimately, NetSuite security is a shared responsibility between NetSuite, your organization, your users, and the solution providers you choose to work with. When required permissions are missing, NetSuite will block authentication and return errors such as “Missing Authentication Token.”
Ensuring the correct permissions are enabled helps keep your data secure and ensures ExtendSync can operate as intended.
Need Help?
If the error persists after updating permissions:
🔎 Search support.cloudextend.io
💬 Chat with Support (bottom-right widget)
📧 Email cloudextend-support@celigo.com
Please include:
NetSuite role name
Screenshot of the error message
Confirmation that all listed permissions are set to Full
We’re happy to help you restore authentication and get ExtendSync working correctly.