Forum Discussion

Copper Contributor

Mar 26, 2017

Use EOP in Hybrid for incoming and outgoing mailflow

Hello, we are in the middle of a hybrid setup between local Exchange 2013 and Office 365. All mail from local exchange mailboxes is routet to the Internet via 3rd party antispam/antivirus appliance....

exchange online

office 365

markspoonman

Copper Contributor

Mar 27, 2017

First of all, big thanks for replying on this topic.

O.K., so looking at the link Paul provided this seems to be a supported scenario.

Last question would be how to modify local exchange to route all outbound mail through EOP and get rid of the 3rd party antispam-appliance. Hybrid wizard created send connector with scope (tenant.mail.onmicrosoft.com). Other send connector with scope * points to 3rd party antispam-appliance.

So do we have to modify the hybrid send connector with scope * then to route all outbound mail through O365? What would be the value for the smarthost were sending to?

NunoAriasSilva

MVP

Mar 28, 2017

Hi Mark,

You can change your send connector to Internet * pointing to Office 365 (MX) record to route all email to Internet using Office 365 EOP.

The best approach to test you can create new Send Connector, put only one domain that you could test and after test with success change the send connector to all.

Deleted
May 09, 2018
Seems like it would OK to use the connector that already exists from the HCW.

Can we use the on-premises Exchange 2013 ECP > mail flow > send connectors > Outbound to Office 365     ...
    step-1    add one low-impact domain to verify this works.
    step-2    later on, add   *    ("all other domains")

Thanks.
===
- Deleted
  May 17, 2018
  We created a new Send Connector from on-prem to M365.
  Added a few domains to "pilot".
  Seems to be working OK.
  ===