Universiteit Leiden

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ICT, Organisation

17 and 18 February: university network and buildings not accessible

16 February 2024

On Saturday 17 February from 9:00 until most of Sunday 18 February, there will be major maintenance on the university network.

This means the following for you

During the maintenance work, the university website will (temporarily) be offline.

Both at home and at the university, you will not have access to the university network during the work activities.

University buildings, including the university libraries, will be closed on both days.

All systems and applications that require you to log in with your ULCN credentials will be unavailable. You will therefore not be able to access various online services of the university.

Are you a researcher? Please note, you may not be able to access your research installations during network maintenance.


Plan your work so that you will not need access to the university network and university buildings on 17 and 18 February

Working remotely

The university network will not be available. Remote Workplace (Citrix) will not be working. Office365 and OneDrive will work as normal. MS Teams will also be available, both the app and the web version.


You will only be able to access your university email via Office 365.


It will not be possible to use Brightspace.

Telephone system

It will not be possible to call from and to university phone numbers.

Emergency number

If you are abroad and need to call the university's emergency number on 17 or 18 February, call
+31 320 33 13 43.

Do you have any questions?

Please contact the ISSC Helpdesk before 16 February via the Helpdesk Portal, via helpdesk@issc.leidenuniv.nl or
+31 (0)71 527 8888.

Please note: in the weekend of 17 and 18 February the Helpdesk will also not be available.

Why this maintenance?

This maintenance will make the university network future-proof with improved bandwidth, higher network speeds and better security.

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