Service user's password changed from CCPv1/UX1 is not propagated to Active Directory and consequently to Exchange. However, corresponding task onUserChangeAsync has completed successfully.
In such circumstances, password change does not take effect in OWA and customers cannot login with new password.
A direct effect of bug #OA-8183 whereby max re-delivery attempts limit for APS resource event handler is set to 64. This causes numerous constantly failing APS events to stay in processing queue for ~6 hours. Repeated re-deliveries lead to ActiveMQ journal bloat.
Contact your Technical Account Manager or a member of Pooled Technical Associates team to clarify the status of the software-related issue.
For workaround, contact CloudBlue Technical Support.