MANTL Provisioning Error "Unauthorized. Errors reported by remote server: Authorization failure. The authorization header is invalid or missing"
Feb 5, 2026
Okta Integration Network
Okta Classic Engine
Okta Identity Engine
Overview
MANTL provisioning flow fails with the following error visible in the Okta dashboard:
Automatic provisioning of user <username> to app MANTL failed: Error while verifying if user <username> exists: Unauthorized. Errors reported by remote server: Authorization failure. The authorization header is invalid or missing
Applies To
- MANTL
- Provisioning
- Error
Cause
The API token used to create the API connection is invalid.
Solution
- Go to Okta Admin Console and navigate to Applications > Applications > MANTL > Provisioning > Integration > Edit.
- Enter the API token obtained from MANTL.
- Click Test API Credentials, verify the connection was successful, and then click Save.
- Attempt the failed tasks again. Navigate to Dashboard > Tasks. Any failed assignments should appear under Tasks.
- After locating the failed task for the user that should be retried, click on Retry Selected.
