Live status of all services Advisory · resolved

Field Service mobile app users experience intermittent sign-in failures

Dynamics 365 Apps CR1551339

Field Service mobile app users experienced intermittent sign-in failures.

Status
Service restored
Feature
Field Services
Region
Not specified (all regions)
Started
Nov 12, 2026, 18:30 CET
Resolved
Nov 13, 2026, 13:30 CET
Duration
19 h

Root cause

A dependency service responsible for authentication was unavailable.

Next Steps: We’re reviewing our code for improved performance and potential automated recovery options to reduce or avoid similar issues in the future.

Final status

The upstream dependency service has recovered. We have confirmed via service diagnostic review that users are no longer experiencing intermittent sign-in failures with the Field Service mobile app.

A Post Incident Report will be published within five days.

Timeline

Every update Microsoft posted for this issue, newest first.

  1. Nov 13, 2026, 16:22 CET

    The upstream dependency service has recovered. We have confirmed via service diagnostic review that users are no longer experiencing intermittent sign-in failures with the Field Service mobile app.

    A Post Incident Report will be published within five days.

  2. Nov 13, 2026, 09:56 CET

    We are continuing to monitor diagnostics of the upstream service dependency for recovery as actions are being performed to mitigate the issue.

    Next Update: Friday, November 13, 2026, at 4:00 PM UTC

  3. Nov 13, 2026, 07:05 CET

    Our monitoring alerted us to an issue where Field Service mobile app users experience intermittent sign-in failures. Our investigation identified that an internal upstream service dependency, Exchange, which supports the sign-in functionality, is experiencing a service outage. This service outage has caused sign-in requests to intermittently fail at the authorization step. We are monitoring service diagnostics for recovery as actions are performed to mitigate the service outage on Exchange.

    Next Update: Friday, November 13, 2026, at 9:00 AM UTC

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Source: Microsoft Graph, Service Communications API. This is the view of a Swiss Microsoft 365 tenant: services not licensed there are missing, and individual issues may affect your tenant differently. Microsoft names the region only in the issue text. The Switzerland view shows issues for Switzerland, for Europe in general and those without a region, but not issues that only name other countries such as Germany or the UK. This page is not provided by Microsoft.