Multi Cloud Solutions (Azure, IONOS, OTC)

To resolve the current issues, maintenance work will be performed today between 4:30 p.m. and 5:30 p.m. During this time, there will be a service interruption affecting most of the services at RWTH for approximately 10 minutes. Please take this last-minute announcement into account when planning your work.

The work has been completed, and the issue has been successfully resolved.

Even though most of the services are up and running again, the root cause of the problem has not been resolved. We are continuing to work behind the scenes to fix the issue. However, this also means that disruptions may still occur.

The work has been completed, and the issue has been successfully resolved.

Login via RWTH Single Sign-On (SSO) is currently disrupted. As a result, it is not possible to log in to any connected services.

There is currently a widespread disruption affecting, among other things, the SSO, though not limited to it. The root cause analysis is still underway.

Most of the services are currently up and running again. The analysis is ongoing. We cannot rule out the possibility of further outages.

Most of the services are up and running again. Please note, however, that the underlying issue has not yet been resolved, and disruptions may therefore continue to occur.

Explanation Following the Outage:
On June 22, 2026, starting at 9:00 a.m., there was a widespread outage affecting our services, which primarily impacted the RWTH Single Sign-On but was not limited to it. By around 12:00 p.m., the situation had largely stabilized, allowing users to log in via RWTH Single Sign-On again; however, other issues (e.g., with the IT Center ticket tool and RWTHmoodle) persisted. On the same day, between 4:30 p.m. and 5:00 p.m., the data center firewall was rebooted, which resolved the remaining issues. The disruption was caused by problems with the data center core switch. To ensure a lasting improvement in the situation, maintenance on the affected system was successfully carried out on June 30, 2026.

There may currently be issues logging in via RWTH Single Sign-On (SSO).
This is because a new certificate has been active in the metadata since 9:30 a.m. today.
The relevant department has been notified and is working with the system operators to resolve the issue.

During the period Wednesday, May 27 2026, from 11:00 to approximately 12:00 CEST, the servers responsible for authentication and licensing of Microsoft services at RWTH Aachen will be migrated to a new network. During this maintenance window, logging in to Microsoft products via Single Sign‑On (SSO) will not be possible. Accounts that are already logged in should not experience any restrictions.

The services directly affected are:
- Login to the M365 apps (Word, Excel, PowerPoint, OneDrive, SharePoint) via egal@m365.rwth-aachen.de or egal@students.rwth-aachen.de
- Azure Dev Tools for Teaching via egal@students.rwth-aachen.de
- Login to Microsoft Azure via egal@azure.rwth-aachen.de

Note for affected users:
Please plan your work with the listed services so that no new logins are required during the specified time window.

Maintanance has been finished

There is currently an issue with the login process; we are still investigating the cause and working to resolve it.

The issue has been fixed

Durch ein MySQL Upgrade müssen wir eine Änderung an der Datenbank Struktur vornehmen. Während der Wartung ist die Anwendung kurzzeitig nicht verfügbar.

Sind fertig. Funktioniert wieder

Die Zertifikate auf unseren Authentifizierungs-Servern für die Anmeldung mit den @m365, @students und @azure-Microsoft Konten werden aktualisiert. Im Anschluss werden auf den Shibboleth-Servern die Metadaten aktualisiert.
Wir gehen nicht von einer Einschränkung beim Login aus.

RWTH Single Sign-On login ist not possible at the moment.
Existing sessions are not affected.
We are working on fixing the problem.

The problem has been solved.

There are currently disruptions to RWTH Single Sign-On. After entering your login details, the screen loads and then an Internal Server Error appears. This affects all services that use the RWTH Single Sign-On login.
The specialist department has been informed and is working to resolve the issue.

The problem has been fixed.

During this period, the routing of the previous XWiN routers (Nexus 7700) will be switched to the new XWiN routers (Catalyst 9600). These routers are essential for RWTH's network connection. This changeover also requires the migration of the DFN connection, which is switched redundantly to Frankfurt and Hannover, and the RWTH firewall to the new systems.
There will be complete or partial outages of the external connection during the maintenance window. All RWTH services (e.g. VPN, email, RWTHonline, RWTHmoodle) will not be available during this period. The accessibility of services within the RWTH network will be temporarily unavailable due to limited DNS functionality.

Der Uplink nach Frankfurt wurde erfolgreich auf das neue System geschwenkt.

Umbau des Uplinks nach Hannover beginnt.

Uplink nach Hannover auf das neue System umgezogen.

BGP v4/v6 nach Frankfurt und Hannover sind nun über die neue Routern funktional.

Es stehen noch ein paar kleinere Nacharbeiten an.

Wartung ist abgeschlossen. Der Datenverkehr läuft nun vollständig über die neuen Router!

Problematik mit der Anbindung zur Physik identifiziert, Lösung erfolgt morgen früh.

Zurzeit scheint es zu stark verzögerten Antwortzeiten bei der Nutzung der o3- und o3-mini-high Modelle in den Azure OpenAI Instanzen zu kommen.
Hierbei sind laut interner Analyse nur die o.g. Modelle betroffen. Andere Modelle wie 4o oder o1 scheinen keine Einschränkungen zu haben und können normal genutzt werden. Wir hoffen, dass sich die Symptome in den nächsten Tagen verbessern.

Das Problem scheint nun seitens Microsoft behoben worden zu sein

This evening around 20:25 - 21:00 there was a performance low in the SSO service and was checked by the specialist department during this time. The problem has been solved and fast logins without waiting times are possible again.

At the moment, single sign-on and multi-factor authentication are sporadically disrupted. We are already working on a solution and ask for your patience.

For a short period of time, there was an error while using RWTH Single Sign-On.
The problem has been solved.

Es werden heute zwischen 10:15-10:30 Uhr die Metadaten der Cloud-Infrastruktur aktualisiert. In dieser Zeit kann es zu Ausfällen beim Login zu den Microsoft-Diensten kommen.