---
type: concept
title: Matrix-ID (MXID)
created: 2026-06-30
updated: 2026-06-30
tags: [identity, matrix, identifier]
related: [matrix, matrix-home-server]
sources: ["output/rz_uni_greifswald_de_dienste_allgemein_instant_messaging_chat_matrix_anmelden.md"]
---

# Matrix-ID (MXID)

The **Matrix-ID (MXID)** is the unique global identifier for a user on the Matrix network. 

For users at the Universität Greifswald, the MXID follows a specific format:
`@mxid-XXXXX:matrix.uni-greifswald.de`

The ID consists of a local part (the user's unique handle) and the domain of the [[matrix-home-server]]. This ID is assigned to the user upon their first successful login via [[shibboleth]].