8 May 2026

Update 11 May, 13:30 hrs.

Work continued throughout the past weekend to address the impact of the disruption that occurred last Thursday evening. As a result, a large number of staff accounts were temporarily deactivated.

All accounts have now been reactivated, and staff should once again be able to use Office 365. This includes applications such as Outlook (email), Word, Excel and Teams.

Unfortunately, this does not mean that all issues have been fully resolved. For example, not all profile pages on our website are currently visible, and some online services are not yet running smoothly. The ISSC team is working hard to resolve these issues as quickly as possible.

Staff who encounter problems are advised to restart their laptop. Then you should be able to regain access to their account and other services. If problems persist, please contact the ISSC Helpdesk ( helpdesk@issc.leidenuniv.nl,  +31 (0)71 527 8888). The staff are ready to assist.

Emails
Please note that users affected by the disruption did not receive emails (including Outlook invitations) during the outage. The sender will have been notified of this. These emails will therefore need to be sent again.

We are sorry that not everything is operating as it should. The ISSC asks the remaining affected users to bear with us a little longer.

Further updates will be shared here as soon as new information becomes available.

Update 8 May, 15:45 hrs.

We have been working hard to address the consequences of the disruption that occurred Thursday evening, which resulted in a large number of staff accounts being set to inactive.

ISSC has confirmed that the reactivation process of these accounts is going well: many staff members now have access to their accounts again. Those who are still unable to access their accounts are kindly asked to bear with us for a little longer. We hope to have all accounts reactivated as soon as possible.

Staff who should now have access to their accounts and/or, for example, Teams, but are still encountering problems are advised to restart their laptop. Then it should be possible to regain access to their accounts and other services.  

We understand that this disruption is causing problems for our staff, and we regret that this has happened. Anyone who is still experiencing certain IT issues after activating their account can contact the ISSC Helpdesk after the weekend. The staff there will be ready to assist you.

A further update will be posted here when there are relevant developments to report.

Update 8 May, 11:35 hrs.

As you may have noticed, the university is experiencing a disruption. This is the result of an internal technical issue, whereby a large number of staff accounts were set to inactive on Thursday evening. As soon as the issue was identified, the process of reactivating all accounts was initiated. This process is still ongoing, it is currently unclear when all systems will be fully operational again.

In addition to being unable to access your own account, you may also temporarily be unable to use other services, such as Microsoft Office or Salto. It is therefore possible that you have regained access to your UL account, but not to these services. This issue is also temporary in nature.

We regret that some of our staff have been affected, as this may hinder your work. We would like to ask all affected colleagues for a little more patience, and to check periodically whether your account has been reactivated.

An update will be posted here as soon as there are any further developments to report.