I have a customer who is using Unity 4.0(5), and over the past several days, they have been reporting that subscriber mailboxes are being randomly locked out. At first, I thought users were just fat-fingering their passcodes, but as days have gone on, everyday they are reporting about 6 or so users whose mailboxes show locked in Unity. I have checked the configuration and they do not have any limitations in place as far as locking mailboxes after any number of invalid passcode entries, etc. Does anyone know what could be causing this issue, or is this some bug that has been addressed. As always, any info that can be provided is greatly appreciated.