Microsoft KB Archive/256184

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XADM: ForestPrep Fails with Extending the Schema Error

Article ID: 256184

Article Last Modified on 2/26/2007


  • Microsoft Exchange 2000 Server Standard Edition

This article was previously published under Q256184


The ForestPrep procedure may fail with the following error message:

Error code 0XC1037AE6 (31462): Extending the schema in the Active Directory failed. Please consult the following error log: %s\LDIF.ERR.


The cause of this error may be that the MaxReceiveBuffer attribute is set below that of the default in Microsoft Windows 2000.


You can determine if this is the case by doing the following:

  1. At a command prompt type the following command:


  2. At ntdsutil, type ldap policies.
  3. At Ldap Policies, type connections.
  4. At Server Connections, type connect to server servername.
  5. At Server Connections, type quit.
  6. At Ldap Policies, type show values.
  7. Make sure that MaxReceiveBuffer is set to 10485760. If not, proceed with steps 8 through 11.
  8. At Ldap Policies, type set maxreceivebuffer to 10485760.
  9. At Ldap Policies, type commit changes.
  10. At Ldap Policies, type quit.
  11. At ntdsutil, type quit.


Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.

Additional query words: exch2kp2w

Keywords: kbbug kberrmsg kbpending KB256184