How to add custom ribbon button in Report tab of outlook

Question

I want to add my custom ribbon button in the "Report" tab of Outlook. I am able to add a ribbon button in "Home" Tab of Outlook. Here I have attached the image where I want to add my custom ribbon button.

Thanks

Answer 1

Ribbon XML Code is here,

<ribbon>
    <tabs>
      <tab idMso="TabReadMessage">
        <group id="grpMessageRibbon" Label="My Group">
          <button id="btnTest" Label="My Button" size="large" />
        </group>
      </tab>
    </tabs>    
  </ribbon>

Ribbon XML load based on it's ribbon id.

  public string GetCustomUI(string ribbonID)
        {
            string ribbonXML = String.Empty;

            if (ribbonID == "Microsoft.Outlook.Report")
            {
                ribbonXML = GetResourceText("MicrosoftOutlookReport.xml");
            }

            return ribbonXML;
        }

Thanks