Who Can See Your Custom Emoji in Microsoft Teams?
Uploading a custom emoji in Teams is not a private shortcut for your own chat. Microsoft says the emoji joins your organization's shared library. Check the image and its audience before you click Add emoji, especially if it contains a face, customer name, or internal screenshot.
Miles Crawford
The library belongs to the organization, not the conversation
Microsoft's admin documentation says custom emoji and reactions are accessible to all users in the tenant. A tenant is the organization's Microsoft 365 environment. Uploading while you are in a small group chat does not make the new emoji exclusive to that group.
The picker calls the collection Your org's emoji. That wording matters: treat an upload as something coworkers can find and reuse, rather than as an image you have only sent to the people in the current conversation.
| Audience | What Microsoft documents |
|---|---|
| People in your tenant | Custom emoji are available in the shared organization library. |
| People outside your tenant | They cannot browse your tenant's custom emoji in their own picker, but can see emoji sent to them in cross-tenant and federated scenarios. |
| An authenticated user with the asset details | Microsoft says an AAD-authenticated user who obtains the content URL and image ID can access or download the asset. |
A hidden picker entry is not a confidentiality boundary. Do not use a custom emoji to store information that must stay inside a particular chat or project.
Your upload is not anonymous
Microsoft Support says anyone can right-click a custom emoji to see who created it and when. A joke uploaded quickly during a conversation can therefore remain both reusable and attributable.
Use an image you are comfortable having linked to you at work. A neutral reaction is usually a better fit than a coworker's face, an embarrassing screenshot, or a private in-joke that loses its meaning outside the original group.
If you uploaded something by mistake
- Stop sending it. Note its emoji name so the person helping you can find the right entry.
- Right-click the emoji. If Delete appears, select it and confirm. Creating an emoji does not guarantee you have deletion permission.
- If Delete is missing, ask your Teams admin to remove that specific emoji or check your deletion policy.
- Do not promise that it has disappeared for everyone immediately. Microsoft Learn says removal can take up to 24 hours across the tenant; Microsoft Support says it may take a few days. The two pages disagree, so plan for a delay and have affected users check again.
Clearing the Teams cache may help remove a stale local entry. It does not recall an image another person already viewed or downloaded. For sensitive material, follow your organization's normal incident process rather than treating emoji deletion as the whole fix.
Give the library an upload rule, not a false privacy promise
Teams has separate controls for using custom emoji, uploading them, and deleting them. Admins can turn the feature on or off in Messaging settings and control upload and deletion through Messaging policies. Microsoft documents uploads as enabled by default, with deletion disabled by default except for admins.
If accidental uploads are a recurring problem, ask for a clear image rule and a named person who handles removal. Restricting who uploads can reduce mistakes; it does not make approved emoji private to those uploaders.
Before uploading, check that the image is appropriate for the whole organization, contains no sensitive material, and is yours to use. Start with a workplace-safe image from the Teams emoji collection, then use the upload guide for the actual steps. For a shared starter set, use the small reaction-set guide instead of adding dozens of private jokes.
Sources
Checked September 30, 2026. Visibility and policy claims come from Microsoft's documentation; the image-selection and response advice above is practical guidance.