The DFN Association (Association for the Promotion of a German Research Network) has informed us that the eduroam service (Easyroam) is currently experiencing disruptions.

Network connections via eduroam cannot be established reliably at this time.

The DFN is working on a solution; no further information is available at this time.

Trouble caused by: Unknown

On the second Friday of every month, the monthly Windows updates are released. Please install them on your DESY Windows devices as soon as possible to ensure that they are up-to-date and secure.

To do this, connect your Windows device to the internal DESY network after the updates have been released. Use VPN if you are extern. When prompted or at the end of the day, restart or shut down your Windows device.

Seven days after the release of the updates, a forced restart of the computers will take place if this has not taken place in the meantime.


Hint:
On Wednesday which follows the release of the updates from 17:00 to max. 20:00, trouble-free working in the Windows environment cannot be guaranteed due to the monthly maintenance work on the central Windows servers.

It is recommended to log off or shut down DESY Windows devices on Wednesday before the maintenance starts. You should also log off from public Windows systems (terminal servers) beforehand.

Maintenance caused by: Windows updates and the monthly maintenance work on the corresponding central computers

Regular Maintenance Slot: TSM (ADSM) backup server

Time: each Tuesday, 12:00 pm - 8:30 pm
Systems: all

Impact: The TSM backup servers will be partly down. It will not be possible to restore files on the central Unix or Windows systems from backups made by the TSM.

An apology must be made in advance: It is always possible that things do not work as planned. Therefore the given ending times may not be kept as promised.

Maintenance caused by: Update of the Service

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With macOS version 26.4, you may no longer be able to access Windows network drives using SMB. This is due to a confirmed bug in SMB client of MacOS.

Apple is expected to fix the issue in the next macOS version (26.5).

Until the fix is released, a workaround is available. For details, see the following webpage:
https://xwiki.desy.de/xwiki/short/507d4

Caused by; Bug in the SMB Client of macOS 26.4

When digital security certificates are used in emails sent via Microsoft Outlook, it may occur that emails are sent incomplete.

Based on current findings, the issue arises after messages have already been saved as drafts. Starting from the second modification after the initial creation of a draft, changes are no longer saved in the message.

Please use one of the following workarounds to bypass the issue:

- Send emails via https://mail.desy.de
- Do not sign emails in Outlook with digital security certificates

For further details and step-by-step instructions, visit:
https://it.desy.de/services/e_mail/mail_clients/outlook/known_problems

The issue has been reported to the vendor for a problem solution.

The following two DESY standard PCs are currently no longer available from stock:

- Dell Pro Micro Lite QCM1250 (U5/16/512)
- Dell Pro 14 Plus PB14250 (with US keyboard)

If these devices are requested via the AMS, significantly longer delivery times must be expected. Depending on the outcome of the ongoing price negotiations, these devices may also no longer be available at the previous price.

Caused by; General shortage of RAM, hard drives, and SSDs on the market (see: https://www.techbook.de/pc-mac/hardware/dram-speicher-preis)

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In this storage service, the default settings for permissions when sharing a directory may lead to unplanned behaviour, which we would like to draw your attention to with this information.

The behaviour is based on the fact that the default settings also include the right to delete. The result can be that data becomes inaccessible to the person who shared the data if one of the persons with whom the data was shared moves it; this corresponds to copying it to the target folder and then deleting it in the source folder.
The files and directories are not lost, but are now in the directory tree of the person who moved them.

To work around this issue until it is fixed, the recommendation is not to move any data that has been shared with you via Sync & Share. Persons already affected will be informed directly.

A support request is in progress at the manufacturer.

If you have any questions, please contact uco@desy.de.
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The default setting for automatic calendar entries in Zimbra has changed: Appointments will now only appear in your calendar after you have accepted them.

Users who wish to continue having appointments automatically added to their calendar without manually accepting them first can adjust this setting as follows:

1. Log in at https://mail.desy.de
2. Go to "Settings" → "Calendar"
3. Enable the option "Automatically add received appointments to calendar"

This change to the default setting for this option is required for security reasons.

As part of the modernization of the printer service, significant changes will take effect for Linux and macOS users printing from the internal network. Printing using the guest print service via guestprint10 is not affected by these changes.

Please review the following points and adjust your settings as needed:

Discontinuation of Predefined Printer Names:
- Only one printer name per printer will remain (e.g., "...ps1").
- Printer names for special formats (e.g., "...ps1a3") or color printing (e.g., "...cp1") will be removed. Predefined settings are no longer available. Please manually select the respective tray or format in the print dialog of the used application.

Review and Adjust Printer Settings:
- Users of centrally managed Linux computers (so-called "green desktops") do not need to take any further action.
- If you are currently using spool-lpr.desy.de to setup printers, please switch to the new service cups.desy.de. Documentation for setting up cups.desy.de can be found here:

Linux: https://it.desy.de/services/druck/linux/
macOS: https://xwiki.desy.de/xwiki/short/2857f

spool-lpr.desy.de will be decommissioned in the near future.

If you require assistance or have any questions, please contact your group administration or the IT Helpdesk (uco@desy.de, extension 5005).
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On April 14, 2026, the host caldav.desy.de will be deactivated.
This host was used to exchange calendar data with Zimbra via the CalDAV protocol.

All users can then use mail.desy.de as an alternative.

This change was announced by the Computer User Committee (CUC).
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The planned work for migrating the data from Mattermost to Nextcloud Talk has been completed.

Currently, there are still some remaining tasks to address and resolve operational anomalies observed with approximately 3,500 users.

The web address https://chat.desy.de will switch from Mattermost to Nextcloud Talk on the upcoming Monday 20.04., 13:00h. Afterwards, Mattermost will no longer be available.
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This change, originally planned for April 14, 2026, is being postponed due to organizational reasons. We will inform you as soon as a new date has been set.

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Sending via SMTP/STARTTLS (port 587) will be disabled. All users who currently use email clients or services that send emails via this port must take action and update their configuration in time.

Please ensure that all affected email clients are switched to the currently recommended and secure SSL/TLS protocol by this date.

In the future, the following settings must be used for sending emails:

Server name: mail.desy.de
port 465
encryption: SSL/TLS

Depending on the email client, the naming of these options may vary — some clients may display only “SSL” instead of “SSL/TLS”; in such cases, please select “SSL”.

Authentication is performed using a Zimbra Application Code (see documentation below). As username, you may use either your email address or your DESY username.

Further information and setup instructions can be found at:
https://it.desy.de/dienste/e_mail/mail_clients/index_ger.html
https://it.desy.de/dienste/e_mail/mail_clients/thunderbird/index_ger.html

Background: Due to known vulnerabilities, STARTTLS (also referred to as “Opportunistic TLS”) is no longer considered secure and will therefore be discontinued.

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