Hybrid Agent Setup failing

Question

It fails at the Validate Hybrid Agent for Exchange Usage. The error I am seeing in the log is: ERROR 10349 The connection to the server 'guid.resource.mailboxmigration.his.msappproxy.net' could not be completed.... unable to connect to the remote server with the credentials provided. The call to 'https://guid.resourec.mailboxmigration.his.msappproxy.net/EWS/mrsproxy.svc' failed. Error details: The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Basic realm I have disabled and re-enabled MRSProxy, I have enabled basic authentication on the EWS site. Am I using the wrong credentials there? If so, what am I supposed to use there?

Answer 1

Hi @ Ryan Wilderman ,

The Mailbox Replication Service was unable to connect to the remote server using the credentials provided. Please check the credentials and try again. The call to 'https://6fbbfcd9-9983-4bc7-8c9f-d44e461f6d24.resource.mailboxmigration.his.msappproxy.net/EWS/mrsproxy.svc' failed. Error details: The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Basic realm="6fbbfcd9-9983-4bc7-8c9f-d44e461f6d24.resource.mailboxmigration.his.msappproxy.net",Negotiate,NTLM'. --> The remote server returned an error: (401) Unauthorized.. --> The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Basic realm="6fbbfcd9-9983-4bc7-8c9f-d44e461f6d24.
                                      resource.mailboxmigration.his.msappproxy.net",Negotiate,NTLM'.

Based on this error message, the issue may be due to the migration endpoint password in wrong on On-Premises end.  

I recommend that you refer to the following link to reset the password for the account used to set up the migration endpoint to see if the issue persists:

Office 365 Mailbox Move Fails – The Remote Server Returned An Error (401) Unauthorized. (cloudiffic.com)

Mailbox Replication Service was unable to connect to the remote server - Azure365Pro.com  

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