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MailFlow from Office365 to IronPort hybrid Configuration

Hi Everybody,


My Configuration 

Office365 Exchange Online in hybrid mode with 2 Exchange 2010 behind 2 IronPort to relay the mailflow across internal to external and external to Exchange.


I want to know if it's possible when the hybrid mode is running, to target the mail flow "from office365 to External" to the Ironport hosted in my infrastructure.


to be clear, I want :

when a migrated (In Office365) user send a email to an external domain, this message is routing to the IronPort to be delivered to the external domain.


Anybody can tell me if it's possible and how ? I know that it's allow to enable TLS mode in SMTP connecter to route properly message from office365 to another mail system.

I can't install an Edge server to make this.


Thanks a lot,




Alexandre R.

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