Create customEmoji

Namespace: microsoft.graph

Important

APIs under the /beta version in Microsoft Graph are subject to change. Use of these APIs in production applications is not supported. To determine whether an API is available in v1.0, use the Version selector.

Create a new custom emoji in the teamwork messaging of the organization, which adds the custom emoji to Teams for the tenant. The emoji image is provided as base64-encoded content bytes.

Permissions

Choose the permission or permissions marked as least privileged for this API. Use a higher privileged permission or permissions only if your app requires it. For details about delegated and application permissions, see Permission types. To learn more about these permissions, see the permissions reference.

Permission type	Least privileged permissions	Higher privileged permissions
Delegated (work or school account)	TeamworkCustomEmoji.Create	Not available.
Delegated (personal Microsoft account)	Not supported.	Not supported.
Application	TeamworkCustomEmoji.Create.All	Teamwork.Migrate.All

HTTP request

POST /teamwork/messaging/customEmojis

Request headers

Header	Value
Authorization	Bearer {token}. Required. Learn more about authentication and authorization.
Content-Type	application/json. Required.

Request body

In the request body, supply a JSON representation of the teamworkCustomEmoji object.

The following table lists the properties that are required when you create a custom emoji.

Property	Type	Description
contentBytes	String	The base64-encoded image content for the emoji. Supported formats include PNG and GIF.
displayName	String	The unique display name of the custom emoji. Key. Must be unique and must not conflict with existing emoji names.

Response

If successful, this method returns a 201 Created response code and a teamworkCustomEmoji object in the response body.

Examples

Request

The following example shows a request to upload a custom emoji.

POST https://graph.microsoft.com/beta/teamwork/messaging/customEmojis
Content-Type: application/json

{
    "displayName": "thumbsup_custom",
    "contentBytes": "iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAAOxAAADsQBlSsOGwAABGhJREFU..."
}

Response

The following example shows the response.

HTTP/1.1 201 Created
Content-type: application/json

{
    "@odata.context": "https://graph.microsoft.com/beta/$metadata#teamwork/messaging/customEmojis/$entity",
    "displayName": "thumbsup_custom",
    "contentBytes": "iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAAOxAAADsQBlSsOGwAABGhJREFU...",
    "createdDateTime": "2026-06-10T12:00:00Z",
    "createdBy": {
        "user": {
            "id": "670374fa-3b0e-4a3b-9d33-0e1bc5ff1956",
            "displayName": "Adele Vance"
        }
    }
}

Related content

• List customEmojis