The topology is the heart of the Lync installation. In the topology, there is information about sites, pools, servers, file stores, different databases, domains, services, and roles.
Without this piece of information, we will not be able to restore anything, and we will have to recreate the entire installation from scratch.
Creating a backup of your topology is an easy and quick task.
There are two ways to back up or restore your topology. The supported way according to Microsoft is to do it through the Topology Builder.
The Topology builder is installed together with the Lync administrative tools and must be run by a user with administrative privileges on the system, typically a member of the CSAdministrator group. ...