Live status of all services Advisory · resolved

Users may be unable to import .XLSX files in Microsoft Viva Glint

Microsoft Viva MV1522708

Users were unable to import .XLSX files in Microsoft Viva Glint.

Status
Service restored
Feature
General
Region
Not specified (all regions)
Started
Oct 22, 2026, 14:00 CEST
Resolved
Oct 23, 2026, 22:51 CEST
Duration
32 h 51 min

More info

Users received an error message indicating that the file was uploaded as an invalid format.

As a temporary alternative, users could have imported the impacted files in .CSV format.

Scope of impact

Your organization was affected by this event, and users who were attempting to upload a .XLSX file to Viva Glint were impacted.

Root cause

A recent change intended to improve record count accuracy introduced a code conflict that caused .XLSX file types to be misidentified, resulting in these files not recognized and failing to upload in Viva Glint.

Next steps:
- We're continuing to improve our configuration change and feature upgrade process so that we can ensure consistent service availability.

This is the final update for the event.

Final status

We've confirmed that our reversion of the impacting change for all impacted users has ensured that Viva Glint correctly identifies .XLSX files, allowing these files to be imported as expected.

Timeline

Every update Microsoft posted for this issue, newest first.

  1. Oct 23, 2026, 22:53 CEST

    We've confirmed that our reversion of the impacting change for all impacted users has ensured that Viva Glint correctly identifies .XLSX files, allowing these files to be imported as expected.

  2. Oct 23, 2026, 21:12 CEST

    We've identified that a recent change intended to improve record count accuracy introduced a code conflict that results in files in .XLSX format not being recognized as the intended file type. We're reverting this change.

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