Message trace is the way to check that. It should show if the message is being sent to the mailbox and then also show the forwarding.
What are different ways to check email forwarding which are receiving to internal ID to external ID?
Vinod Survase
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What are different ways to check email forwarding which are receiving to internal ID to external ID?
for example:
We have internal shared mailbox ID ******@internaldomain.com and we are forwarding emails from this internal ID to external ID called ******@externaldomain.com so now we wanted to check does it really forward all the emails to external ID or not as we have seen many of the emails are not being forwarded and we checked in Message trace report.