Bamboo does not have a documentation about how to configure secure administrator sessions as Confluence and Jira. For Jira there's this documentation: Configuring secure administrator sessions.

The only difference is for Bamboo we need to use this flag to disable the web sudo: -Dbamboo.websudo.disabled=true.

This is how to disable the secure administrator sessions for Bamboo:

1. Stop Bamboo application;
2. Add the property -Dbamboo.websudo.disabled=true to your Bamboo system properties;
3.  Start Bamboo back.