Issue Summary

Usernames having underscore (_) in them are not searchable through Audit log user search section.

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. Create a sample user testing_under_score.
2. Search for this user through 'Audit log' user section.

Expected Results

Username should appear. 

Actual Results

Below message is seen 

There are no matches for the current search criteria.

Workaround

You can try to search with below strings. 

• testing
• testing_