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Cardiff University: SharePoint Online: Unexpected errors accessing files

Cardiff University · cardiff.ac.ukImpact: majoridentified2026-07-21 14:46 UTC
Public — what happened

Summary

We are continuing to work closely with Microsoft to find the root cause of this issue, alongside efforts to develop a permanent fix. In the meantime, the continued recommended workaround if you are impacted by this issue is to utilise a private/incognito session on your web browser. Please do note that private/incognito sessions can behave slightly differently in different web browsers, so closing all other browser windows or using a different browser entirely can help if you continue to encounter the issue within the private/incognito session.

Timeline

Source of record: provider status page. Mirrored as reported; times in UTC.

Independent path health

The status page is the symptom. SquidGrid measures the paths that reach Cardiff University against their own baselines — whether the routes carrying your traffic degraded, at which handoff, and who owns that stretch.

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Related: Cardiff University status & history. SquidGrid is not affiliated with Cardiff University.