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Article ID: 203745 - Last Review: November 2, 2013 - Revision: 3.0

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With the Windows NT 4.0 DHCP server, you can create a Reservation that is outside a particular scope range but still within the subnet. If you delete the database and need to perform a Reconcile to recover your lease information, you will lose any reservations that are outside the Scope. Reservations defined within scopes are recovered.


To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
  • Windows Service Pack Center ( -or-

  • 152734  ( ) how to obtain the latest windows nt 4.0 service pack
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: (


Microsoft has confirmed that this is a problem in Windows NT Server 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.

More information

For additional information about how to create DHCP reservations or for a better definition of what reservations outside scopes are, please see the following article(s) in the Microsoft Knowledge Base:
196066  ( ) Limitations Creating DHCP Reservations

Applies to
  • Microsoft Windows NT Server 4.0 Standard Edition
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