ADMT ERR3:7075 and 7711

Hey folks,

In a case you are encountering the following errors when running ADMT (Active Directory Migration tool):

  • Valid on Windows Server 2008R2, 2012, 2016.

ERR2:7711 Unable to retrieve the DNS hostname for the migrated computer
ERR3:7075 Failed to Change Domain Affiliation – ADMT Migration

Please ensure you have enabled the following things:

1) In the new server open “Registry” and navigate to:

Create a new “Multi-String” and name it “NullSessionPipes” and then add the following values:

2) Open the Group policy and Enable the following Policy on both AD sites:
Navigate to “Computer Configuration > Policies > Administrative Templates > System > Net Logon >
“Allow cryptography algorithms compatible with Windows NT4.0”

  1. romek 2 years ago

    holy shit how much time i spent about this issue, last months I have done AD merging and facing this issue


  2. Bill Bunnell 2 years ago

    OMG! Thanks for this info!! One thing I found is that when I reboot target DC that has the “NullSessionPipes” registry entry, the value data is removed and I need to re-add the entries. Have you seen this?

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