Hi, i have running exchange 2003 in production with abc.com domain Now i have install exchange 2010 in new domain xyz.com . and my exchange is connected with smart host. Now i have create 1 user on exchange 2003 and Add the user account to the Exchange Domain Servers security group in the domain Similarly for exchange 2010. and create 1 send connector on exchange 2010 In the console tree, navigate to Organization Configuration > Hub Transport, and then in the action pane, click New Send connector.On the New SMTP Send connector wizard Introduction page, in the Name field, type a unique name for the connector. From the Select the intended use for this Send connector drop-down list, select Internal, and then click Next.On the Address Space page, click Add. In the SMTP Address Space dialog box, type the name of the remote SMTP domain, and then click Next.On the Network settings page, only the Route mail through the following smart hosts setting can be selected. Click Add.In the Add Smart Host dialog box, in the IP address or Fully qualified domain name (FQDN) field, type the IP address or FQDN of the Exchange 2003 bridgehead server in the remote forest, and then click OK. To specify more than one bridgehead server as a smart host, click Add and enter additional IP addresses or FQDNs, and then click Next.On the Configure smart host authentication settings page, in either Basic Authentication or Basic Authentication over TLS, type the user name and password that will be used to authenticate the connection, and then click Next.On the Source Server page, click Add. In the Select Hub Transport or Subscribed Edge Transport Server dialog box, select one or more Hub Transport servers in your organization, click OK, and then click Next.On the New Connector page, click New.On the Completion page, review the following, and then click Finish to close the wizard: A status of Completed indicates that the wizard completed the task successfully. A status of Failed indicates that the task wasn't completed. If the task fails, review the summary for an explanation, and then click Back to make any configuration changes. after that This example uses the Enable-CrossForestConnector.ps1 script in the Shell to set permissions on the Send connector. .\Enable-CrossForestConnector.ps1 -Connector "Legacy Forest" -user "ANONYMOUS LOGON" -genericMTA Similarly on exchange 2003 In the Exchange 2003 forest, open Exchange System Manager. Right-click the Connectors container that's located in the routing group where the server that will host this connector resides, select New, and then select SMTP Connector.Select the General tab. In the Name field, type a unique name for the connector.Select Forward all mail through this connector to the following smart hosts, and then type the IP address or FQDN of the Exchange 2010 Edge Transport server or Hub Transport server. If you enter an IP address, it must be enclosed in brackets, for example, [192.168.1.1].Click Add to add a local bridgehead server. In the Add Bridgehead dialog box, select one or more Exchange 2003 servers.Select the Address Space tab, and then click Add to create an address space. In the Add Address Space dialog box, select SMTP, and then click OK. On the Internet Address Space Properties page, enter the SMTP domain name of the Exchange 2010 forest, and then click OK.Select the Advanced tab, and then click Outbound Security. In the Outbound Security dialog box, select Basic Authentication, and then click Modify. In the Outbound Connection Credentials dialog box, enter the user name for the account that you created in the Exchange 2010 forest, enter the password for the account, and then click OK. Click OK to close the Outbound Security dialog box. Click OK But Still my mail Flow is not working ....Please Help

Hello Did you created a recieved connector in exchange 2010 ? New-ReceiveConnector -Name "Legacy Forest" -Usage Internal -Server HubA -PermissionGroups ExchangeServers -RemoteIPRanges <IP address of Fourth Coffee Hub Transport server> -AuthMechanism ExternalAuthoritative -Bindings 0.0.0.0:25 Check can you telnet port 25 on both the servers. Thanks Mouzzam Hussain Visit to my Blog mouzzamh.wordpress.com

No, i have not created receive connector . can you help me in creating with EMC . its has to be of same name as of send connector. bcoz i have created send connector with name "sendconn" , i have to choose internal and provide my exchange server Ip.

i have created send connector pointed to exchange 2003 server.. still not working

please check this article for creating recieve connector http://technet.microsoft.com/en-us/library/bb123546.aspx Configure cross-forest connectors between Exchange 2010 and Exchange 2003 servers without a trust relationship by using external authenticationThanks Mouzzam Hussain Visit to my Blog mouzzamh.wordpress.com

i am following the same document . but i have skip this part You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Send connectors" and "Receive connectors" entries in the Transport Permissions topic. In this scenario, you create the cross-forest connectors between an Active Directory forest with an Exchange organization that's running Exchange 2010 and a second Active Directory forest with an Exchange organization that's running Exchange 2003. You can create the Send connectors and Receive connectors between the Exchange 2010 Edge Transport server and the Exchange 2003 bridgehead server or between the Exchange 2010 Hub Transport server and the Exchange 2003 bridgehead server. To establish mail flow between the forests, follow these steps: Create user accounts in each forest for authenticating the sending server. This step isn't required if you use external authentication. Create a Send connector and select Internal as the usage for this connector on either the Exchange 2010 Edge Transport server or Hub Transport server. Modify the authentication for the new Send connector. Create an SMTP connector on Exchange 2003. If you're using external authentication, modify the registry on the Exchange 2003 server to allow the Exchange 2003 server to send and receive XEXCH50 properties anonymously. The following procedures establish cross-forest mail flow between the Exchange 2010 transport servers in the Contoso.com forest and the Exchange 2003 bridgehead servers in the FourthCoffee.com forest by using either Basic authentication or external authentication. After you perform one of the following procedures, we recommend that you test mail flow by sending a message between the two organizations. You should also examine the protocol logs to verify that XEXCH50 data is propagated to Exchange 2003. i am not getting this part. I have already create user on both the server and added to the exchange security group . and create send connector on both , providing same user id and password. And i have also created receive connector on exchange 2010 server with ip address pointing to 2003 exchange server . but still i am not able to send and receive mail.

Hi Can you post message track log about your test ? I want to know the process of my mail flow. Terence Yu TechNet Community Support