Dear Exchange Expert,
Currently we are implementing the Office 365 Hybrid in our environment which is running Exchange 2010. We have finished the HWC and we are now migrating the first pilot test account and has been successfully completed. However after test, I found that there is issue with email flow:
1. Email from External Domain (yahoo/Hotmail) to migrated O365 User, Pass Test
2. Email from Migrated O365 User to External Domain (yahoo/Hotmail), Pass Test
3. Email from Non migrated on premise users to migrated O365 User, Pass Test
4. Email from Migrated O365 User to Non Migrated On Premise Users, Failed Test
After doing tracing, I found the error message below. Currently the message is still pending and going nowhere.
Please help to advise what is the issue caused.
Thanks.
Regards,