Changes / Smartsheet / Investigating errors using Login with Microsoft

Smartsheet: Major incident: Investigating errors using Login with Microsoft

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 from the diff below (Sol; type: incident outage). Check the diff before relying on it.

Major incidentLabel: outage (model (Jev), 100%)Changed Detected Source: stspg.io (opens in new tab)

What changed

AddedTitle#1
Before: not present
After: Investigating errors using Login with Microsoft
AddedImpact#2
Before: not present
After: major
AddedStatus#3
Before: not present
After: postmortem
AddedStart time#4
Before: not present
After: 2025-10-29 16:56 UTC
AddedResolved time#5
Before: not present
After: 2025-10-30 01:24 UTC
AddedAffected components#6
Before: not present
After: Core Application - Single Sign On ( Company Credentials ), Single Sign On ( Company Credentials )
AddedUpdateinvestigating#7
Before: not present
After: 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).
AddedUpdateidentified#8
Before: not present
After: Azure has identified the issue and is working on a resolution (https://azure.status.microsoft/en-us/status).
AddedUpdatemonitoring#9
Before: not present
After: A fix has been implemented and we are monitoring the results.
AddedUpdateresolved#10
Before: not present
After: This incident has been resolved.
AddedUpdatepostmortem#11
Before: not present
After: 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.

First version of this incident archived by Rewindex. View the live incident (opens in new tab).

History of this incident

When (UTC)ChangeKind
Major incident: Investigating errors using Login with Microsoft (this change)
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.
Major incident

All Smartsheet changes → · Smartsheet profile · Markdown · JSON