Thank you Dan.

Yes as I thought there is no licence required.
Software is at 9.56 and is equipped with 6 digital users.

After suddenly entering 717 to access mailbox to no avail "That Mailbox does not exist" and doing some troubleshooting I defaulted the system and reprogrammed but still getting the same response. So in other words no admin tasks or logins are successful

The troubleshooting explaination for what I hear is that no mailbox is assigned to the extension but this is not the case as I have specifically checked this in 47-02

Cheers