Using XML to add a custom button on Outlook 2013's Meeting Request Ribbon

Question

I'm trying to add a button to Outlook's 'Respond' meeting request ribbon, but it's not showing.

I've downloaded both the Office 2010 and 2013 MSOID identifiers files from Microsoft, but I still can't seem to get it working.

Here are some XML combinations I've tried:

<tabs>
      <tab idMso="TabReadMessage">
        <group idMso="GroupRespond">
          <menu idMso="MenuAcceptInvitation">
            <button id="MyButtonAttachments"
                    label="MyButtonAttachments"
                    imageMso="HappyFace"
                    onAction="OnMyButtonClick" />
          </menu>
        </group>
      </tab>
    </tabs>

I also tried adding another group which doesn't show either:

<contextualTabs>
      <tabSet idMso="TabSetAppointment">
        <tab idMso="TabAppointment">
          <group label="MyGroup1" id="MyAttachmentGroup">
            <button id="MyButtonAttachments1"
                    size="large"
                    label="MyButtonAttachments"
                    imageMso="HappyFace"
                    onAction="OnMyButtonClick" />
          </group>
        </tab>
      </tabSet>
    </contextualTabs>

I don't have 2010 here but when I try your code in 2007 with this settings - How to: Show Add-in User Interface Errors it says - Failed to find Office control by ID ID: TabReadMessage - are you sure you use the correct name? Otherwise it seems you're doing it correctly — PetLahev
Actually thanks alot for the link to Interface Errors, I'm sure that'll point me in the right direction at least. I'll give it a try when I'm back at work. — Daniel Minnaar

Daniel Minnaar Daniel Minnaar · Accepted Answer · 2016-08-08T05:53:40

It turns out that Outlook doesn't want me adding anything to their existing interface groups (in this case idMso="GroupRespond"). Oh well.

Using XML to add a custom button on Outlook 2013's Meeting Request Ribbon

1 Answers