We've migrated a client from a PBX system where they could set the message to be automatically deleted after X days. In looking through the Unity System Guide, it states that Cisco?Unity does not automatically delete messages when they reach a certain age.
The short answer is because in many Unity installs we don't "own" the message store so automatically removing messages that were not explicitly acted on by a user is dangerous. We do provide a tool to setup rules that allows admins to do this type of thing - The message store manager:
Microsoft also has a mailbox admin tool that can do some of the same things that ships with Exchange 2000 and later - it's not quite as detailed and can be more difficult to use but both can be configured to do what you want.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...