Question
What Jamf Pro user account privilege is needed to access and authenticate to the Failover URL when SSO is configured in Jamf Pro?
Answer
The user account in Jamf Pro will need access to the 'Sso Settings' privilege. Navigate in Jamf Pro to Settings > System > User accounts and groups > Click on the user account in question > Click on the Privileges tab and click on the Jamf Pro Server Settings section. In that section you will need to ensure the user has both Read and Update checked for the 'Sso Settings' privilege.
This requirement is documented here.