A. Raising a forest is a one-way process that you can't reverse. All domains in the forest must be in Windows 2000 native mode or later--if they aren't, the upgrade will fail and Windows will display a warning. During the upgrade, Windows will raise any Win2K native-mode domains to Win.NET Server domain level. To raise your forest, perform the following steps:

  1. Log on as a domain administrator of the root domain to a domain controller (DC) or a machine running the Win.NET Server administration tools.
  2. Start the Microsoft Management Console (MMC) Active Directory Domains and Trusts snap-in (go to Start, Programs, and select Administrative Tools).
  3. Right-click the root (i.e., Active Directory Domains and Trusts), then select the Raise Forest Functional Level option from the context menu--Windows will display the current forest mode.
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  4. Select the new forest mode, then click Raise.
  5. Click OK to close the confirmation dialog box.

Windows will inform you that it has completed the change and will replicate the change to all DCs.