Cannot create Exchange Online Migration Endpoint with Exchange 2007 Server using only NTLM Authentication

Cannot create Exchange Online Migration Endpoint with Exchange 2007 Server using only NTLM Authentication

  •  
  •  
  •  
  •  
  •  
  •  

I’ve been battling an issue for a few days now and finally stumbled upon a workable solution via PowerShell.

Scenario

One of my customers has an existing Exchange 2007 deployment.  The OWA instance is configured to only use NTLM authentication.  ExRCA (http://www.testexchangeconnectivity.com) comes back clean, and I can proxy log in to any mailbox on the server.

When configuring the migration endpoint through the Office 365 Exchange Admin Center, I would receive an error that the migration endpoint could not be discovered, even after entering the credentials, server, and RPC proxy server values manually.

Solution

The solution ended up with my old friend PowerShell.  You can create migration endpoints through it using the New-MigrationEndpoint cmdlet.  The key was forcing the authentication to NTLM.

New-MigrationEndpoint -ExchangeOutlookAnywhere -Name NewEndPointName -ExchangeServer EXCHSERVER.DOMAIN.local -RpcProxyServer OWA.DOMAIN.com -Credentials (get-credential onpremiseaccount@domain.com) -EmailAddress onpremiseaccount@domain.com -SkipVerification -Authentication NTLM

Published by Aaron Guilmette

Helping companies conquer inferior technology since 1997. I spend my time developing and implementing technology solutions so people can spend less time with technology. Specialties: Active Directory and Exchange consulting and deployment, Virtualization, Disaster Recovery, Office 365, datacenter migration/consolidation, cheese.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.