Schoolyear incident

Login issues when using Office 365 applications

Minor Resolved View vendor source →

Schoolyear experienced a minor incident on January 16, 2026 affecting Microsoft Azure, lasting 5d 3h. The incident has been resolved; the full update timeline is below.

Started
Jan 16, 2026, 10:30 AM UTC
Resolved
Jan 21, 2026, 01:43 PM UTC
Duration
5d 3h
Detected by Pingoru
Jan 16, 2026, 10:30 AM UTC

Affected components

Microsoft Azure

Update timeline

  1. investigating Jan 16, 2026, 10:25 AM UTC

    Image issue: There seems to be an change in the licensing of Microsoft Office causing licensing error in Office 365 applications when opening for example Excel. The students cannot login to these applications and receive an error message. We advise your AVD admins to investigate why this issue occures. Simultaniously, we are also checking if we can assist with this issue from our side.

  2. investigating Jan 16, 2026, 10:49 AM UTC

    The issue seems to be related due to a Microsoft change in the activation process of a MS-365 license. Your AVD admins can resolve this issue by updating the network layer of the Office image in order to resolve the issue created by a Microsoft change. In order to help you as much as possible, Schoolyear is separately also looking into updating the template network Office layer so that the AVD admin could use that information if wanted. Once we can share an update about this, we will send an email to all AVD admins directly and will publish the instructions on this page.

  3. monitoring Jan 16, 2026, 11:11 AM UTC

    To aid AVD admins in resolving this issue, we have quickly investigated the issue ourself as well and have released instructions for AVD admins on how to resolve this issue. We traced this issue back to an extra FQDN required for Office activation. See the exact changes here (https://github.com/schoolyear/avd-image-community/commit/ff4d3b48c3909e2601e6da78d80deea61b624b6d) To resolve the issue, follow the instructions below: Instructions when using Schoolyear AVD version 2.1: https://github.com/schoolyear/avd-image-community/blob/main/layers/com.schoolyear.win10-office365/README.md#16-jan-2026-update Instructions when using Schoolyear AVD version 1: https://github.com/schoolyear/avd-deployments/blob/main/images/office365/README.md#16-jan-2026-update

  4. resolved Jan 21, 2026, 01:43 PM UTC

    The cause of the problem is known and can be resolved by the AVD admin.