Do you wonder what is this "Unknown Agent" which appears in your rating feed?
This happens when Nicereply is not able to assign a rating to a certain user. The rating URL structure looks like the following one:
"Unknown Agent" is caused by a broken username token in the rating link. Either it doesn't match or the user hasn't been imported to Nicereply, usually when you're using a general rating link in the ticketing system.
How to fix it
1. If each user has her own rating link
Make sure that user's username is the same as username token in the rating link. Go to "Staff" and edit user.
2. If you're using integration with ticketing system
Make sure that all users, whose user rating link is automatically assigned to them by variables (user_ID), are imported into Nicereply. Go to "Staff" and repeat user import from you help desk tool.