Forwarding rule in O365 to GWS is not working

Question

Hi Team / MS support,

May I seek for your help and advise why my forwarding rule is not working?

I have a same user email address in O365 and GWS (ezra@epldtgws.online)

I'm migrating from O365 to GWS. In google, they said that users can received the new email even if the MX record is not yet pointed in GWS , they say that I just need to add a forwarding rule in O365 and add the test domain alias of user (******@epldtgws.online.test-google-a.com)

I have created a forwarding rule from my O365 user (ezra@epldtgws.online) to GWS (******@epldtgws.online.test-google-a.com) and its not working. it states that "Your email couldn't be forwarded from ezra@epldtgws.online to another email address.

[ezra@epldtgws.online (ezra@epldtgws.online)]
Your message wasn't delivered because the recipient's email provider rejected it."

If I sent email directly to "******@epldtgws.online.test-google-a.com" from gmail, yahoo (both consumer account) and my O365 , the email will received in GWS account of ezra@epldtgws.online.

May i know why forwarding rule is not working?

Answer 1

How/where did you configure the forwarding? By default, Exchange Online blocks forwarding to external addresses, so the first thing to do here is go over this article to cover the basics: https://techcommunity.microsoft.com/t5/exchange-team-blog/all-you-need-to-know-about-automatic-email-forwarding-in/ba-p/2074888

If you are still having issues, run a message trace against one of the failing messages and post the (sanitized) results: https://learn.microsoft.com/en-us/exchange/monitoring/trace-an-email-message/message-trace-modern-eac