Exchange 2019 forward outside the domain

Question

Exchange 2019 Std on-prem.

We need to set up an inbox/mailbox rule (although I suppose it could also be a mailflow/transport rule) where an email from specific outside sender A to specific internal recipient X is both stored in the mailbox normally and forwarded to another outside recipient B.

External Domain Sender A (example@whatever .com) -> Internal Recipient X (me@Company portal .com)
Internal Recipient X (me@Company portal .com) -> move to folder + mark as read + Forward to External Domain Recipient B (example2@whatever2.com)

This works perfectly fine if B is an internal address. However, whenever B is an external domain, it fails, no matter what method I try (forward, relay, etc etc)

Any ideas on where the problem may be? All other email flows normally.

Thanks

Answer 1

I just needed to enabled RemoteDomain forwarding. Took way too much time digging through documentation to find the answer.

Set-RemoteDomain Default -AutoForwardEnabled $true

Thanks!

Answer 2

Hello,
You may create a 'Mail Contact' for the external recipient. Then, you should be able to forward to the external contact

Please mark as "Accept the answer" if the answer helps you. Your suggestion will help others also !

Regards,
Manu