Steps to include a new system to an existing STMS Domain controller.

Introduction

In any SAP landscape, managing system transports efficiently is critical to maintaining consistency across environments. The SAP Transport Management System (STMS) plays a central role in controlling and moving changes between systems such as Development (DEV), Quality (QAS), and Production (PRD).

There are few blogs and guides available on STMS configuration — from setting up domain controllers to defining transport routes. However, this blog takes a slightly different perspective. Instead of covering the standard setup process, I’ll focus on a real-world scenario: adding a new system to an existing STMS domain controller.

In this example, we’ll walk through how to integrate an additional Quality system into an existing three-tier landscape (DEV → QAS → PRD). This will effectively extend the current landscape and demonstrate how to configure transport routes, verify connectivity, and ensure smooth synchronization across all systems.

Whether you’re expanding your SAP environment or fine-tuning your transport architecture, this step-by-step guide will help you add a new system seamlessly to your existing STMS configuration.

In this blog post, we are going to see how we can add an additional new quality system in between DEV and QAS in the TR route and how we can create target groups.

Existing configuration is DS4(Dev)—QS4(Quality)—PS4(production and also domain controller).

Post adding the new system, the TR route will be DS4(Dev)—–QS3(new system)——-QS4(QA)—-PS4(domain controller).

Prerequisites

Before starting the configuration, ensure the following prerequisites are met:

1. The new system is fully set up — The SAP installation and post-installation activities (such as profile configuration, instance setup, and client creation) are complete.
2. RFC connectivity is established — The new system can communicate with the existing domain controller via trusted RFC connections.
3. Transport directories are shared and accessible — The /usr/sap/trans directory is mounted and accessible from the new system and all systems in the landscape.
4. User authorizations are in place — The user performing this configuration has the necessary SAP Basis and STMS administration rights.
5. Existing STMS domain is active — Verify that the domain controller (typically DEV) is configured and operational.
6. TMSADM user password must be maintained in all the systems (in client 000). The password of TMSADM needs to be consistent within the whole transport domain.
7. Access of DDIC user in client 000.

Delete the existing STMS config in the new system:

If your new SAP system already has an STMS (Transport Management System) configuration, you’ll first need to remove it before joining an existing STMS domain controller. This ensures there are no conflicts or duplicate entries when connecting to the central landscape.

Follow these steps to clean up the existing TMS configuration from a standalone system:

1. Log in to the master client (000) of the new system (for example, QS3). Open transaction STMS and make sure you’re logged into the domain controller.
2. Go to transaction SE06. Under the section Database Copy or Database Migration, click Perform Post-Installation Actions, and confirm with Yes.

1. When prompted to select the source system for a database copy, choose No.
2. In the next dialog, you’ll be asked whether to delete the TMS configuration — select Yes.
3. Confirm the following prompts by choosing Yes until you see a message confirming that the STMS configuration has been successfully deleted.

Once the existing configuration is removed, your system is ready to be added to the main STMS domain controller.

Steps to include the new system to an existing STMS DC

Login to the master client of the new system (in this case QS3-000), and go to STMS. System will give a prompt to add the system to transport domain. In this case we want QS3 to be added to PS4 domain, but in the below screenshot, its showing by default SS4(another system),  click on “other configurations button as shown below.

Give the Domain controller server details that you want the new system to be added as shown below and give save.

Enter the password of TMSADM in Domain controller client

After giving password, QS3(new SID) will be added to domain controller. Now the next step is to login to domain controller client and approve the system.

Login to Domain controller client, go to STMS—Overview—Systems, check QS3(new SID), its waiting to be included. It’s not active yet.

Click QS3—Click Menu—SAP systems—Approve.

Click Yes and you will get one more pop up to distribute the configuration, click yes, after that, system will become active.

Adding the new system to the TR route

Login to Domain controller— Go to STMS—click on transport routes

Follow the below step and select graphical editor

Click on Edit

Select transport layer ZDS4 and Transport layer SAP and delete those lines

Drag the new SID QS3 down and Go to Edit

After selecting “Add transport route”, click on DS4 and draw a line to QS3

You will get a pop up select ZDS4 transport layer and make sure you are selecting consolidation route.

Again repeat same steps and create a route for SAP transport layer.

Create a transport route between QS3 and QS4, this time it will be a delivery route.

After completing this step, click YES

You will get this pop up click yes

Distribute and activate the changes.

Check the activation log for any errors or warnings.

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