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Hello,
I am trying to hide a unique ID in the HTML body of an email so I can get the Email ID and store it in a SharePoint List to reply to it later in the flow. When the first email is sent, I have my unique ID hidden at the end of the body with the following line of HTML:
<div style="display:none !important">[UNIQUE ID HERE]
However, any time someone replies to this email, including when Power Automate uses the action "Reply to email" later on in the flow, it makes the unique ID visible in the email thread.
How do I make the Unique ID stay invisible when people reply to the email thread?
Don't place the Unique ID to the mail body but save it as a MAPI custom property of the message.
It will require to compose an email using a GRAPH request though.