Lab Topology
------------

The lab used in this example is a hybrid environment: it includes both an
on-premises deployment and an Office 365 tenant. The on-premises domain is
the fictitious ``flexcorp.com``, and in addition to Active Directory this
deployment includes Skype for Business Server and Exchange Server.

When selecting a vanity domain name for our Office 365 tenant we had to
use a domain that we actually owned. Thus, our end users' email addresses
and SIP addresses use the domain ``vosslab.net``.

It is not necessary to reveal the underlying topology - Exchange Server
addresses, Skype for Business front end pools, and so on. As you will see,
all that VOSS-4-UC requires is the addresses of the PowerShell proxies
that it will use to communicate with the UC applications.