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SBS 2008: Migrations fail when migration preparation tool has not been run

This post discuss an issue, where migrations to SBS 2008 are failing, particularly with Exchange setup, because customers are not running the Migration Preparation Tool on the SBS 2003 server prior to beginning the migration process. This tool performs the following actions:

  1. Installs update 943494 on the SBS 2003 server to extend the migration grace period from 7 to 21 days.
  2. Runs ADPREP to update the forest, domain, and group policy object access control entries.
  3. Changes Exchange 2003 from Mixed mode to Native mode.
  4. Adds the Authenticated Users group to the Pre-Windows 2000 security group.

For more information on all of the pre-migration steps that must be performed, including steps on how to run the Migration Preparation Tool, please see http://technet.microsoft.com/en-us/library/cc527611.aspx

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