We have setup Exchange 2013 environment in the existing Exchange 2010 environment.

100 users now migrated to Exchange 2013.  The users those who migrated  to Exchange 2013 complaints that they are not getting some emails from internal as well as External.

We found some Queue in Exchange 2010 HUB server like as follows

SRVINFHUB02\227125         SmtpRelay... Retry  1867         0        Normal    0              hub version 15

Kindly advice how can resolve this issue?

 

Hi ,

Please share me the Last error on the queue viewer.

I did not find any error in the error in column.Mail stuck in 2010 HUB server and all these emails to Exchange 2013 users.

Hi ,

1.Please check the last error on the all the hub transport servers in exchange 2010.

2.Did you made any changes on the receive connectors in exchange 2013 cas or mbx servers ?

3.Please enable the protocol logging for the intra org send connector by using the below mentioned command in all the hub transport servers in exchange 2010.

Set-TransportServer servername IntraOrgConnectorProtocolLoggingLevel Verbose

4.Please enable the protocol logging for the receive connectors in exchange 2013 cas servers which is on the name(Default Frontend casserver)

5.Share me the output for the below mentioned command.

Get-ExchangeServer | ft -au

6.Share me the output for the below mentioned command.

Get-TransportConfig | fl *sha*

This is error we are getting the in HIB server

This is error we are getting in the HUB server

Hi ,

Did you have changed anything on the default receive connector's in exchange 2013 else have you created a new receive connector on exchange 2013 to receive emails from the exchange server 2010.

Default setting for the connector in the CAS :

Connector name (Default Frontend casserver) : 

Based on my knowledge there is no need to do any changes on the receive connector in exchange 2013 cas server to receive emails from exchange 2010.

Hi ,

Did you have changed anything on the default receive connector's in exchange 2013 else have you created a new receive connector on exchange 2013 to receive emails from the exchange server 2010.

Default setting for the connector in the CAS :

Connector name (Default Frontend casserver) : 

Note :  Make sure the exchange server authentication is selected on the default front end receive connectors in all the cas servers.

Based on my knowledge there is no need to do any changes on the receive connector in exchange 2013 cas server to receive emails from exchange

Hi Nithyanandham

It has resolved.

The issue was due new receive connecter  for no authenticated mail flow. 

Hi Ashraf,

The above problem occurs because the Exchange server cannot authenticate with the remote Exchange server. Authentication is required for Exchange servers to route internal e-mail messages between them. In order to solve this issue, all receive connectors that receive internal e-mail messages should have Exchange Authentication enabled.

For more information, here is a helpful KB for your reference.

Some e-mail messages become stuck in an Exchange Server environment

https://support.microsoft.com/kb/979175/en-us

Hope this can be helpful to you.

Best regards,