This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
Hi,
I have a question regarding email relaying in Hybrid Configuration Setup as mentioned below,
Current Setup:
Exchange 2016
Exchange Online
External Email Gateway (Forcepoint Cloud Security - MX Record holder)
HCW is setup with Centralized Transport Enable.
External Email lands on FP and forwarded to Exchange on-Prem. and redirected to Exchange Online if mailbox is not available on-Prem.
New Requirement:
We want Forcepoint to Send Email to Exchange Online and from EOL to On-Prem.
Forcepoint <>EOL <> Exchange2016
As per my understanding following is the plan I have scoped.
Forcpoint: Fairly Simple
Connector to Send Emails to EOL
Connctor to Receive Emails from EOL
Exchange 2016:
Disable Send Connector (External Emails to Forcepoint)
Modify Send Connector (Emails to EOL)
change Address space from @mydomain.onmicrosoft.com to *
Exchange Online: (O365)
New: Email Receive connector from Forcepoint IPs to Exchange Online
New: Email Send Connector Send * from Exchange Online to Forcepoint via FP Smart Host
Modify Email Send Connector From EOL to On-Prem. Exchangechange address space from * to @mydomain.com & change -RouteAllMessagesViaOnPremises from True to False
This is high level plan. My only concern is if email from Internet to EOL, Mailbox not available on EOL, should it automatically check for send connector created from EOL to On-Prem or would I need to change Authoritative Status of my accepted domain setting?
Any other advise would also be appreciated.
Thank you & regards,
What is set for the accepted domain now in Office 365? If you are in hybrid mode and have mailboxes on-prem, then you need to set it to Internal Relay.
You may want to also re-run the Hybrid Wizard and choose the settings you want to ensure all the correct changes are done.
HI Andy,
Currently Accepted Domains are set as Authoritative in O365.
Should I also set it to internal relay on Exchange 2016 (On-Prem.)
Regards,
Junaid Abrar
No need to set to internal relay on-prem - you can leave as authoritative there - in hybrid you have remote mailboxes on-prem that represent the mailboxes in 365. Any mail that on-prem Exchange gets for those remote mailboxes will be routed to the remote routing address of the on-prem remote mailbox via the hybrid send connector.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(48, 71%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELZ%3C/text%3E%3C/svg%3E)
In general, HCW will help to configure the connector for the mail flow between on-premises and Exchange Online. You can re-run HCW and don't enable centralized mail transport. Then check connectors settings between on-premises and Exchange Online. Here are more information for Manage mail flow using a third-party cloud service with Exchange Online and on-premises mailboxes.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.