Upgrading your domain and forest functional levels is a simple task once the new domain controllers are in place and the old ones are decommissioned. But what about the features that take advantage of the upgraded functional levels? There are two important things to do as a domain is upgraded to the 2008 and 2008 R2 functional levels: migrate SYSVOL to DFS replication and enable the AD Recycle Bin.
Although these features have been available for a long time, it’s good to revisit items like these occasionally. Although many domains are using them, there are plenty of environments that have yet to take advantage.
by Mitchell Grande