How to validate connector configuration and ensure consistent mail routing during Exchange Server SE deployment?

Hi @Hanah Cori 

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Based on my research, here are some steps you can take to validate connector configurations and ensure consistent mail routing during your Exchange Server SE deployment: 

1.Verify Connector configuration: 
Run the following PowerShell commands on both Exchange Server 2019 and Exchange Server SE to confirm that the connectors match: 

Get-ReceiveConnector -Server <ServerName> | Format-List Name, Bindings, RemoteIPRanges, AuthMechanism, PermissionGroups  

This will display each receive connector’s network bindings (IP/port), allowed senders (RemoteIPRanges), authentication mechanisms, and permission groups. 

Get-SendConnector | Format-List Name, AddressSpaces, SourceTransportServers, Enabled, DNSRoutingEnabled, SmartHosts  

This shows each send connector’s address spaces (domains it serves), source servers, and whether it uses DNS or a smart host. 

2.Test Mail Flow 

To confirm mail routing between servers and external addresses, you can use: 

Test-Mailflow <SoureServer> -TargetMailboxServer <TargetMailboxServer>  

This tests sending a message from the source server to the target mailbox server. 

Test-Mailflow <SoureServer> -TargetEmailAddress <ExternalEmailAddress>  

This checks mail flow from the source server to an external email address. 

3.Review Transport Service settings 
You can use the following PowerShell command to query Transport service settings that manage routing, queuing, and delivery:

Get-TransportService -Identity <ServerName> | Format-List Identity, ConnectivityLogEnabled, MessageExpirationTimeout, QueueMaxIdleTime, MaxOutboundConnections, ReceiveProtocolLogPath 

For detailed guidance, you can refer to: 

• Get-SendConnector (ExchangePowerShell) | Microsoft Learn 
• Get-ReceiveConnector (ExchangePowerShell) | Microsoft Learn 
• Test-Mailflow (ExchangePowerShell) | Microsoft Learn 
• Get-TransportService (ExchangePowerShell) | Microsoft Learn       

I hope this provides clarity and helps you move forward with confidence. If you have any updates or need further assistance, please feel free to reach out. 

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