You have been asked to take on the administration of a second Jira installation in your company.
You were given the following information about user accounts:
* The company standard is to use Active Directory (AD) to provide user accounts.
* There are several Active Directory systems in use by different business units.
* The second Jira is not to be merged with your main Jira.
* The main Jira system is connected to Active Directory for user accounts.
* The second Jira is using internal user accounts, not Active Directory.
* People using the second Jira are using the same login ID as they would use in Active Directory.
* Your company would like to use Single Sign-on (SSO) but has not yet implemented it for either Jira system.
Which authentication method should you recommend?