4. Click the Raise button (Figure 3.1).
Installing the First OCS 2007 Front-End Server ??? Chapter 3 71
Next, you need to raise the forest functional level. You need to perform this task on a
domain controller at the root of the forest. This may or may not be the same as your production
domain, depending on how your Active Directory deployment is confi gured. To raise
the forest functional level, you will need to perform the following steps:
1. From the domain controller, click Start | Administrative Tools | Active
Directory Domains and Trusts.
2. Right-click on Active Directory Domains and Trusts from the management
window, and select Raise Forest Functional Level.
3. Under Select an available forest functional level:, choose Windows
Server 2003.
4. Click the Raise button (Figure 3.2).
Figure 3.2 Raising the Forest Functional Level
Now that your domain and forest levels are in their associated native modes, we can
move on to the next step within the prerequisites: addressing the need for certifi cates within
OCS 2007.
Certifi cate Authorities
You need certifi cates with OCS 2003 for a number of reasons, which we will discuss later
in this book. The important thing to understand is that this has everything to do with the
72 Chapter 3 ??? Installing the First OCS 2007 Front-End Server
need to properly secure your presence engine to prevent the potential leak of confi dential
company information.
Although it would certainly be easier to use public certifi cates from an authorized CA
such as VeriSign, Thawte, or a similar provider, we will be using an internal CA during most
of this book.
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