we`re planning to implement a hybrid deployment of Exchange2010 SP3 (on premise) and Office 365.
I read a lot about Hybrid configuration wizard and found some information about mail flow.
In our case the current on premise mail-flow is as follows:
Domain: test.de (located at a hosting-provider)
Internal AD-Domain: test.local
MX for Domain test.de: IP of the mail cluster of a hosting provider
Mails from the internet get delivered to mailboxes that are hosted at the hosting provider.
The on-premise Exchange pulls E-Mails via POP3 (PopCon) and delivers the mail to on premise Exchange-Mailboxes.
The on premise Exchange sends outgoing mail via a sending connector that uses the hosting-provider as a smarthost.
Now I would like to configure a hybrid environment with Office365:
- MX should still point to do hosting providers mail cluster and mail should be delivered to the mailboxes there until all mailboxes have been moved to Office365
- Internal mail flow should work correctly between on premise and Office 365
Where I stuck planning is the place in the wizard, where it asks me for a public IP adress and FQDN of my on premise exchange (because I don`t have one yet) and where I have to decide the mail flow path.
How do I have to publish my on premise Exchange (Which ports?)?
If I choose "Route all Internet-bound messages through you on-premise Exchange....":
Will my incoming (Pop3-Pull) and outgoing (SmartHost) mail flow still work?
Looking forward to your suggestions!
Thanks in advance!