---
title: "Creating the Communication User and Communication System"
description: "Create a communication user for MDM and a communication system that lists it for inbound communication."
source: "https://help.rikaiso.com/public-cloud/2026.2/communication-user-and-system"
edition: "public-cloud"
editionLabel: "S/4HANA Public Cloud"
version: "2026.2"
latest: true
language: "en"
section: "Information for Administrators > Setting Up SAP S/4HANA Cloud Public Edition"
updated: "2026-11-05"
---

# Creating the Communication User and Communication System

> Create a communication user for MDM and a communication system that lists it for inbound communication.

> **Draft brief for authors.** Replace with the final text; keep the task-page structure.

**Page type:** Task · **Audience:** SAP key user

**Contains**

1. Maintain Communication Users: a user for MDM with a strong password, or a certificate when the destination will use OAuth client credentials or a client certificate.
2. Communication Systems: a system for MDM; host name informational for inbound-only use; the communication user under Users for Inbound Communication; no outbound users.

**Related information:** `communication-arrangement`, `application-destination`.

**Source in the product repository:** customer guide §2.