Symptoms

When you install an add-in from the Office store, it will come with a predefined set of icons. Depending on your organisation's needs, you might need to change those.

More Information

When you've found what you're looking for, copy the XML content into Notepad or any other text editor and replace the following elements with the image of your choice:

Note: The elements in the above example are from the Report Message store add-on.

In addition, you will need to create a new guid for your add-in:

NEW_GUID_HERE

If you want to easily create a new guid, you can run the following command in Windows PowerShell: [Guid]::NewGuid()

The last step is to save the xml file to disk and install the add-in using the xml file.

Note

This workaround is not supported nor recommended by Microsoft. Should you wish to continue with such a customisation you cannot get in touch with Microsoft Support and request assistance should the add-in stop working or should you experience unexpected behaviours when trying to use the add-in.