Since Sunday, 18 October, at around 19:00, we have been experiencing instability on the university’s staff website. The issue is limited to the staff ...

Due to a telephony disruption, calls to university telephone numbers are not possible. We are working on a solution.

There was a brief network disruption. As a result, it was temporarily not possible to connect to the Wi-Fi network. The issue has now been resolved.

There is currently an issue affecting the educational systems, which prevents users from logging in to certain systems.

A security incident recently occurred involving VOSviewer,a software tool developed by CWTS and used by researchers worldwide. The incident was detect...

There is a glitch causing visitors to unintentionally see a CAPTCHA in some cases. We are investigating this as a priority. We apologize for the incon...

Leiden University is moving to a more uniform sign-in experience. As a result, the familiar blue ULCN sign-in page will gradually be replaced by the M...

This morning there was a brief disruption affecting the new login page; all issues have now been resolved. For more information, see: https://www.staf...

At the moment, there is an outage affecting eduroam across Leiden University. This means you are currently unable to log in via Wi‑Fi. We are analy...

There is currently an issue with signing in using multi-factor authentication via email. The emails with the verification code are arriving late. In s...