Active Directory / LDAP based user access to the spam quarantine is configured but is not working.
"Enable end-user quarantine" is greyed out for the policy groups in Administration > Policy Group > End users
Access denied
Access for your account has not been configured. Please contact your administrator for assistance.
This occurs when the spam quarantine settings are not properly configured either globally or for a specific policy group.
User access to End User Spam Quarantine