Depends on the ixi-UMS Business configuration with the first call to your ixi-UMS voice-mailbox number or manuel from the administrator, you receive the ixi-UMS Welcome E-Mail in your inbox.
You can find all the necessary information in it.
Your ixi-UMS voice-mailbox number is stated. This number can be identical with your ixi-UMS fax number.
Furthermore, this e-mail contains the automatically generated PIN for the login at the phone. You should change this PIN as soon as possible.
The e-mail also contains a link to open your <ixi-UMS voice-mailbox configuration. The adjustments that can be made there can be found in the Manual.