Cannot Confirm New AD User During Import - Error "Validation failed"
Jan 12, 2026
Okta Classic Engine
Directories
Overview
Validation failed on assigning newly-created user to app: /9j/4AAQSkZJRgABAQEAYABgAAD/.....
Applies To
- Active Directory (AD)
- Imports
- User Confirmation
- Okta Classic Engine
Cause
The user has a thumbnail attribute populated in Active Directory
The error message is displayed on the Confirm Imported User Assignments window:
One or more assignment actions could not be performed
Validation failed on assigning newly-created user to app: /9j/4AAQSkZJRgABAQEAYABgAAD/.....
Solution
- Delete the attribute value for the user in the Active Directory.
- Downscale the thumbnail image.
NOTE: The issue can be related to other AD Attributes as well, but the Thumbnail Image is the most common one.
