ADMT Migration and Network Ports

If you are performing an ADMT migration from a computer which sits behind the firewall, it is important that you open the required network ports to allow ADMT computer to communicate with both source and target domain controllers. 

ADMT will fail to work if below network ports are not opened:

  • 389 – LDAP
  • 88 – Kerberos
  • 53 – DNS
  • 445 – SMB/CIFS
  • 3268 – GC
  • 135 – RPC
  • 1024-65535 – Dynamic Port Range

About Nirmal Sharma

Nirmal is a MCSEx3, MCITP and was awarded Microsoft MVP award in Directory Services and Windows Networking. He is specialized in Directory Services, Failover cluster, Hyper-V, System Center, Windows Azure, and Exchange Servers and has been involved in Microsoft Technologies since 1994. In his spare time, he offers technical help by writing tips and articles on several web sites. Nirmal can be reached at [email protected]

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