Cisco Unity Express supports Cascading Message Notification, which allows you to set up a series of notifications to a widening circle of recipients at various time intervals if your message is not immediately responded to.
In the Voice Mail > Message Notification > My Notification Devices window, set your cascade settings to notify specified recipients after a specified time. Range is 5 to 10080 minutes.
Use this procedure to configure notify yourself of voice-mail events by phone, pager, or email.
Choose Voice Mail > Message Notification >My Notification Devices.
In the Notification Device window, click the name of the device that you want to configure.
Enter data into the following fields. The fields shown depend on the type of device that you have selected.
Click Apply to save your data.