How to disable/enable voicemail on IPVS
Log into the business portal at https://portal.yourservices.co.uk/businessportal and sign in with your username/password.
When you are logged in, search for the site in question to or just hit the search button, to show all sites in your company and select the appropriate one.
Once the site is selected, employees tab then select search to list all employees
Select the employee you wish to edit their voicemail settings, and press features.
Scroll down to the bottom and select voice messaging, then configure.
Then within here you can specify what you want to do with the particular users voicemail.