Chapter 1 What’s New for FortiOS 5.0 : New features in FortiOS 5.0 Patch 5 : Anonymize user names in logs
  
Anonymize user names in logs
Log messages can now be configured to replace user names with the word anonymous, so that user names are not visible in log messages. This feature can be enabled from the CLI using the following command:
config log setting
set user-anonymize enable
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