What is the advantage of using Exchange Migrator rather than Microsoft's movemailbox capability in a (NETIQKB28867)

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What is the advantage of using Exchange Migrator rather than Microsoft's movemailbox capability in an Exchange 5.5 to Exchange 2000 IntraSite server to server migration scenario?

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Exchange Migrator 2.x

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The following are the advantages of using EM instead of Microsoft's movemailbox functionality:

• Schedulability allows you to schedule migrations off hours.
  
• Logging capability to review the migration process.
  
• Performance increase moves mailboxes faster.

Formerly known as NETIQKB28867