Forum Discussion
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....
Hi Mark,
To archive the mail flow that you want you need to do the following in this order:
- Change TTL of MX record to 300 sec or 5 min;
- Review your SPF record to have your ip's addresses and Office 365 protection.outlook.com;
- Re-run Hybrid Configuration Wizzard to change the mail flow from centralized transport to users on Office 365 send directly from Office 365;
- Test Mail Flow;
- Change your Send Connector on Your Exchange Server to send directly to Internet;
- Test Mail Flow;
- Change MX record to Office 365;
- Test Mail Flow;
- Change the TTL of MX record to 60 min or 3600 sec
Note: You cannot use the EOP to send mails from your on-premises organization is not supported.