Changes in the DIT Structure

Messaging Server and Calendar Server have introduced a one-tree structure, where there is no Domain Component (DC) Tree. All domain information is held in domain nodes in the Organization Tree. Aliasing is handled entirely differently in the new one-DIT structure.

The bottom half of Figure 3–2 illustrates a one-tree LDAP structure.

Figure 3–2 Two-Tree LDAP Structure Compared With One-Tree Structure