Creating a fully functional Enterprise Voice Enhanced E-9-1-1 configuration is a lot of work in large deployments. The LIS database is a database used to identify the location of a call coming from somewhere in the campus and going out to a certified emergency services provider.
Losing all of this information in the event of a system failure can be frustrating. As networks grow and change over time, this information will change as well. A regular backup of this information is highly recommended. This information is not included in the backup made with Export-CsConfiguration
or Get-CsTopology
.