> For the complete documentation index, see [llms.txt](https://support.docstudio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.docstudio.com/user/mailbox/mailbox-user/how-to-find-a-mailbox-id-uuid.md).

# How to Find a Mailbox ID (UUID)

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* **Mailbox ID (UUID)** — A unique identifier assigned to a mailbox.

See the [Glossary](/glossary/glossary.md) for DocStudio term definitions.
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You may need it when you send an envelope to a hidden mailbox, share the exact mailbox identifier with a partner, or copy mailbox details without relying on the mailbox name.

### Copy the UUID for the current mailbox

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1. Open the mailbox you need.
2. Find **Mailbox UUID** under the mailbox name.
3. Click the **Copy** icon ![](/files/X4R3ogKQfImDFsqiSXMG) next to **Mailbox UUID**.

The UUID is copied to your clipboard.
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<figure><img src="/files/2oBY0L9xCNggFzQBkIPw" alt=""><figcaption></figcaption></figure>
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### Copy UUIDs for other mailboxes

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If you have multiple mailboxes, expand the mailbox list and copy the UUID from the mailbox you need.

1. Expand the mailbox list.
2. Copy the UUID for the mailbox you need.

The UUID is copied to your clipboard.
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<figure><img src="/files/PjiJ9bV8rwqTAY6qax3Q" alt=""><figcaption></figcaption></figure>
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