Service Desk Private Knowledge base license requirements

[Todd Winton]

We are in the process of implementing service desk and would really like to use the knowledge base functionality.  However, the documentation we want to share with our customers should not be publicly accessible.  Is there any way to have knowledge base functionality that keeps information secure without having to use a confluence license for every user?  

[QuentinB]

Hello,

Atlassian Documentation : https://confluence.atlassian.com/servicedeskcloud/serving-customers-with-a-knowledge-base-732528995.html

As you can see there is an option in the JSD (JIRA Service Desk) Administration -> Knowledge base (Access -> Viewing) : All active users and All customers (they don't need a confluence licence)

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[Todd Winton]

What permissions are needed in that space in order for this to work?  I get search results not, but when I click on a link I get prompted for credentials.