I help take care of about 10 different locations mostly hotels with Mitel 200 ICP mostly 5.0 software. We keep getting mailbox 0 hacked by someone logging in and changing to extension number to outside number in Caribean. The calls never go through but it doesn't stop the being hacked continuously I have even set the passcode length to 6 digits. Most of the systems are being answered by AA. Anything I can do to stop this and how is this being done? Maybe computer program that goes through every number? Any Help Appreciated!!!

Make sure the dial "0" is a transfer only to "0" only, and not an extension mailbox.

Did you change all of the passcodes?

Thanks I will change to transfer only. And yes I have changed the Admin and Manager passcodes

So if this continues to happen perhaps it's time to suspect an inside job.

Ok, what about the Technician passcode?

That's an important one. Hope this helped.