Forum Discussion
Unable to receive onpremise exchange email or external domain emails
Hi, I have Exchange 2010 Hybrid setup. I am able to send email from Office 365 migrated mailbox to my on-premise mailboxes or external but unable to receive any external email or email from onpre...
You need to setup connectors between Office 365 and your email servers.
Please refer to the below link for details.
https://technet.microsoft.com/en-us/library/dn751020(v=exchg.150).aspx
Additionaly utilize the below tool to test mail connectivity.
https://testconnectivity.microsoft.com/
If you are still facing issues, please share the NDR message you are getting if any?