# Investigating errors using Login with Microsoft

- Provider: [Smartsheet](https://down.guide/providers/smartsheet)
- Confidence: Confirmed
- Impact: Partial outage
- lasted 8h 28m
- started 2025-10-29 16:56 UTC
- Single Sign On ( Company Credentials )
- us
- id: DWN-1712b93ab8
- Official page: https://stspg.io/vy4lpw3xg0v3

## Root cause
> The issue occurred due to a 3rd party authentication service provider.

[Postmortem](https://stspg.io/vy4lpw3xg0v3)

## Updates from Smartsheet
### 2025-10-29 16:56 UTC: investigating
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).

### 2025-10-29 19:58 UTC: identified
Azure has identified the issue and is working on a resolution (https://azure.status.microsoft/en-us/status).

### 2025-10-29 23:22 UTC: monitoring
A fix has been implemented and we are monitoring the results.

### 2025-10-30 01:24 UTC: resolved
This incident has been resolved.

### 2025-11-18 20:51 UTC: postmortem
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.

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