On the Who Is Online list, administrators may see a * (asterisk/star) at the end of the username. This indicates that the user has set himself to be "invisible." To normal users the user will always be shown as "offline"
Invisible User
The 1.6 Documentation is no longer maintained and some information may be outdated.
The MyBB 1.6 series reached end of life on October 1, 2015.
This means there will be no more security or maintenance releases for these series and forums running these versions of MyBB may be at risk of unfixed security issues. All administrators are strongly encouraged to upgrade their forums to the latest release of MyBB as soon as possible.