The goal is to get an Outlook email with it's Message-Id from Power Automate.
I get an email's Message-ID from my personal Outlook Web mailbox:
Next, I create a Power Automate flow to get this email with this Message-ID:
When I manually run the flow, there is an error message on the "Get email V2" step:
the response is not in a json format
The Message Id used by the connector is not the same as the Internet Message Id found in the email header.
Use Get emails (V2)
action to get a subset of emails, from there you will be able to get the Message Id
.