How to find message ID of an email in Outlook?

To find the message ID of an email in Outlook, please do as follows:

1. Double click to open the specified email whose message ID you are looking for.

2. In the Message window, please click the anchor  in the Tags group on the Message tab. See screenshot:

Note: Alternatively, you can also click File > Info > Properties to open the Properties dialog box.

3. In the Properties dialog box, you can find the Message-ID information in the Internet headers box. See screenshot:

4. Close the Properties dialog box and the message window.

If you have Kutools for Outlook installed, you can apply its Message Header Analyzer feature to get all kinds of message header information easily, including the message id.

1. Click to select the email whose message ID you will get, and click Kutools Plus > Message Header Analyzer.

2. In the Message Header Analyzer dialog, enable the Other headers tab, and you will get the Message ID of the current selected email easily.

Tips: You also can find out the message ID on the Sender Headers tab and Source data tab.