You are looking at documentation for an older release. Not what you want? See the current release documentation.
If you forget your password, you can request the system to send you a link to reset it. The link will be sent to your email and will expire as soon as you successfully reset the password or after an expiration time.
The expiration time is 24 hours by default. To change it, edit the following in exo.properties file.
exo.portal.resetpassword.expiretime=24
The time unit is hour.