How to manually create the Send Connector in Exchange when the MultiSendcon installer fails to do so

In some situations, the MultiSendcon installer might be blocked from automatically creating a matching send connector in your Exchange configuration. In those cases, you can just add it manually:"

1. Open the Exchange Management Shell
2. Execute the command
   new-sendconnector -name MultiSendcon -Addressspaces "SMTP:*;100" -port 2500 -SmarthostAuthMechanism none -smarthosts 127.0.0.1