> [!NOTE]
> **Note:** This functionality was built for conference providers specifically, and was originally available as *[Calendar conferencing add-ons](https://developers.google.com/workspace/add-ons/guides/glossary#calendar_conferencing_add-on)*.

In your [Google Workspace add-on manifest](https://developers.google.com/workspace/add-ons/concepts/workspace-manifests#manifest_structure_for_g_suite_add-ons),
you can specify a distinct `conferenceSolution[].logoUrl` for each conference
solution your add-on defines. These
`conferenceSolution[].logoUrl` images are used in the Google Calendar user
interface to identify the conference solution.

Since these `logoUrl` images are used within Calendar directly,
the images must be present on Google's infrastructure. Specifically, use the
same icon that you use for the add-on's
Google Workspace Marketplace
[store listing](https://developers.google.com/workspace/marketplace/create-listing).

To obtain an image URL that can be used as the `conferenceSolution[].logoUrl`:

1. Open the [Google Cloud console](https://console.cloud.google.com/).
2. If necessary, switch to the project hosting your add-on.
3. At the top-left, click Menu \> **APIs \& Services**.
4. In the list at the bottom, click **Google Workspace Marketplace SDK**.
5. Select the **Store Listing** tab.
6. In the **Graphics Assets** section, upload the intended attachment icon image as an **Application Icon 32x32**.
7. Copy the resulting image URL and use it as the `attachment.iconUrl`.