# Smartsheet: Investigating errors using Login with Microsoft

- Impact (vendor’s label): major
- Status: postmortem
- Started: 2025-10-29 16:56 UTC · Resolved: 2025-10-30 01:24 UTC · Duration: 8.5 h
- Updates: 5 · Affected components: Core Application - Single Sign On ( Company Credentials ), Single Sign On ( Company Credentials )
- [Vendor status page: https://stspg.io/vy4lpw3xg0v3](https://stspg.io/vy4lpw3xg0v3)
- [Company: Smartsheet](https://rewindex.com/company/smartsheet.md)

## Summary

Smartsheet reported a major incident affecting Login with Microsoft and Single Sign On ( Company Credentials ), starting 2025-10-29 16:56 UTC and resolved 2025-10-30 01:24 UTC, lasting 8 h 28 min. Customers experienced authentication errors attributed to an Azure incident and a third-party authentication provider; a fix was implemented before resolution. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2025-10-29 16:56 UTC: We are currently investigating some customer reports of an Authentication error with Microsoft due to an active Azure incident (https://azure.status.microsoft/en-us/status).
- **identified** 2025-10-29 19:58 UTC: Azure has identified the issue and is working on a resolution (https://azure.status.microsoft/en-us/status).
- **monitoring** 2025-10-29 23:22 UTC: A fix has been implemented and we are monitoring the results.
- **resolved** 2025-10-30 01:24 UTC: This incident has been resolved.
- **postmortem** 2025-11-18 20:51 UTC: Beginning on October 29th, 2025, from 8:41AM PDT, users experienced Azure/Microsoft login issues. The issue occurred due to a 3rd party authentication service provider. This was resolved by 5:05PM PDT.

## Rewindex changes for this incident

- 2025-10-29 16:56 UTC: [Major incident: Investigating errors using Login with Microsoft](https://rewindex.com/change/i7c1632ae5b3f70.md)


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Canonical: https://rewindex.com/company/smartsheet/incidents/t99rkm17bw96 · Markdown: https://rewindex.com/company/smartsheet/incidents/t99rkm17bw96.md · JSON: https://rewindex.com/api/v1/companies/smartsheet/incidents/t99rkm17bw96 · Generated 2026-10-18T13:53:26.088Z