Last 20 Issues

Update October 8, 2026

The outage has been resolved by Microsoft. Synchronization of Apple Mail, Calendar, and Contacts with Exchange Online on macOS is possible again.

Original message

Currently, in some cases, synchronization of Apple Mail, Calendar, and Contacts with Exchange Online on macOS is not possible. HM-IT is working to resolve the issue.

To access Exchange Online on macOS in the meantime, we recommend using Outlook for macOS: https://www.microsoft.com/de-de/microsoft-365/outlook/outlook-for-mac?market=de

Background: Apple Mail, Calendar, and Contacts use the EWS protocol to connect to Exchange Online. As Microsoft had long announced, the protocol was shut down at the beginning of October. Apple has announced that, with a future update to macOS 27, these apps will be switched to the Microsoft Graph interface. Apple has not yet provided a date.

The use of EWS can be extended manually by having administrators add a corresponding allow list. HM-IT has taken these steps and has explicitly authorized Apple to continue using EWS.

Update 09 Oct 10:00: The disruption has been resolved and Easyroam can be used again as usual.

Update 06 Oct 13:30:

Unfortunately, the disruption has reoccurred: The Easyroam app is currently intermittently available. DFN is continuing to work on a solution. When we receive new information, we will update this notice again.

Update 05 Oct 16:40: The disruption has been resolved and Easyroam can be used again as usual.

Due to a disruption at DFN, it is currently not possible to create new certificates for Eduroam via the Easyroam app. As a result, people who are configuring Easyroam for the first time or need to renew their certificate are currently unable to connect to Eduroam.

At the moment, no outgoing calls to external phone numbers can be made.

The UCC client, desk phones, and the UCware smartphone app are affected.

Please use your mobile phones wherever possible.

We are working urgently on a solution and will inform you as soon as there are any updates.

We are performing a planned software upgrade on several core network switches. The maintenance work will take place from 14:00 to 15:00.

During this period, there may be occasional brief interruptions or restrictions to network connectivity.

Thank you for your understanding.

The monthly CMS update will take place on Wednesday, 23 September 2026, from 07:00 to 09:00. The CMS cannot be used during this period. From 09:00, you will be able to log in again as usual and make changes to the HM websites.

Important and extensive maintenance work; bbb cannot be used during this time.

LimeSurvey is being reinstalled. Until the new version is active, no new surveys can be created on the old system. Existing surveys can continue to be used.

Due to maintenance work, the system will be unavailable for hours at a time over the weekend.

The disruption has been resolved and the switches are back in operation.

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Currently, the power supply to several switches has failed. As a result, LAN/WLAN service in some areas of Buildings B and E is currently affected.

Building management has been notified and we will update this notice as soon as we know more.

Today, September 8, between 4:00 PM and approximately 7:00 PM, the telephone system will be unavailable due to maintenance work.

Affected: telephones, the UCC client/software, and the UCware smartphone app.

Due to a defect in a transformer, LAN/WLAN connectivity is currently affected in some areas of buildings B/E/R.

Colleagues from Facility Management and the Electrical Workshop are working on a solution.

Phone service is currently unavailable. We are updating the system and will be back online shortly.

The monthly CMS update will take place on Wednesday, 26 August 2026, from 07:00 to 09:00. The CMS cannot be used during this period. From 09:00 onwards, you can log in again as usual and make changes to the HM websites.

We are currently experiencing significant infrastructure issues. Our team is already working intensively on analyzing and resolving the disruptions.

We are carrying out a planned software upgrade on several central network switches. The maintenance work will take place from 17:00 to 18:00.

During this period, there may be occasional brief interruptions or restrictions to the network connection.

We ask for your understanding.

VIMP is being updated to a new version. During this time, you will unfortunately not be able to upload new videos. Estimated duration from 8:30 a.m. to 10:00 a.m.

Thank you for your patience!

Update: The search function is working again on all pages.

Due to a system migration, the search function (site-wide search) on the HM faculty websites may be unavailable all day on August 18.

On Monday, August 17, from 4:30 PM to 4:45 PM, we will be performing maintenance on the FORMCYCLE production environment. During this time, the system will be unavailable, so no work can be carried out in FORMCYCLE.

We will be performing a scheduled software upgrade on several core network switches. The maintenance will take place from 10:00 to 12:00.

During this period, there may be occasional brief interruptions or degradation of network connectivity.

We appreciate your understanding.

We will be performing a scheduled software upgrade on several core network switches. Maintenance will take place from 10:00 AM to 12:00 PM.

During this period, there may be occasional brief interruptions or reduced network connectivity.

We appreciate your understanding.