This information is based off of this wiki
Overview:
Starcode *97 is used to log in another agent into all of the queues which their extension is registered. Please note this will login the extension into ALL the queues it is not possible to choose which one.
In order to be able to use the starcode *97 an “Agent Preference” password must be set
Steps to set password for Agent Preference:
Search for the agent
Explain:
getting to the user extension
setting up a agent password
dialing the *97 and using the extension and password to log agent into all queues