Information that previously was available in the 5.2.5 Admin Guide in regards to user passwords is no longer documented in either 5.5.8 Online-Help or PDF docs.
5.2.5 Administration and Configuration Guide | Managing Users and Security | Configuring Password Settings
STATUS: Documentation Change Request FGL-12253 "Documentation on Password features not in Online-Help or PDF" has been submitted which will be evaluated for a future release. Please refer to the “Resolved Issues” section of the Product Release Notes when new releases are available to identify if a fix for this defect has been implemented. Product Release Notes are available in the “Product Documentation” area of our Support Website at support.quest.com.