Microsoft 365 Alert – Service Degradation – Power BI – Non-owner users can’t refresh some Gen2 Dataflows in Microsoft Fabric – ONGOING

Announcements Sharmista Mohanta

13/08/2026 08:52:00 AM

NHS.net Connect Reference: INC46908268

Microsoft Reference: PB1453611

Issue Status: ONGOING

Issue Description: Non-owner users can’t refresh some Gen2 Dataflows in Microsoft Fabric.

More info: Impact is specific to Microsoft Fabric tenants using Dataflow Gen2 created after Thursday, July 9, 2026, with On-Premises Data Gateway (OPDG) connections.

Affected users receive the error “Data source credentials are missing or invalid” (Error 999999) despite having valid Workspace Admin and Connection Owner permissions.

While Microsoft is working to remediate impact, admins can explicitly grant “Connection Creator” permissions on the OPDG for affected users.

Additionally, admins may resolve this issue using the following steps:

– Open dataflow
– Go to Options > Scale > and disable the feature –

Query Evaluation
Allow use of the modern query evaluation engine

Current Update: 13/08/2026 08:54:00 AM –Microsoft’s review of the API logs has confirmed that a recent configuration update erroneously enabled a requirement preventing users without “Connection Creator” permissions from refreshing Dataflows. They are in the process of developing an updated fix to remediate impact and will provide a remediation timeline.

Scope of impact: Your organisation is impacted by this event, and impact is limited to non-owner users refreshing some dataflows created after Thursday, July 9, 2026, in Microsoft Fabric. This information may be updated as Microsoft’s investigation continues.

Root cause: A recent configuration update erroneously enabled a requirement preventing users without “Connection Creator” permissions from refreshing Dataflows, resulting in impact.

Next update by: Thursday, August 13, 2026, at 8:30 PM UTC