Overview:
When performing a Document Update with the Vault Loader the result is SUCCESS but the roles on the Documents are not updated.
Root Cause:
Update Document Roles is a separate Vault Loader action from a Document Update regularly used to update Document fields.
Solution:
To Update Document Roles select Document Roles as the Object Type in the Vault Loader.
Related Documentation:
Vault Help Documentation: Vault Loader: Update Document Roles
Thank you