Resolved -
Microsoft has confirmed that the issue related to intermittent failures retrieving container images from Azure has been resolved.
Services have now stabilised, and performance across all hosting groups has returned to normal.
We will continue to monitor the environment to ensure ongoing stability, however no further impact is expected.
Jun 16, 16:11 AEST
Monitoring -
Microsoft has identified a potential underlying cause related to a recent update to a backend Azure service, which resulted in the intermittent 401 authentication errors when retrieving container images.
A mitigation has been implemented and services are showing signs of recovery.
We are continuing to closely monitor stability across all hosting and will provide further updates if required.
Jun 16, 09:43 AEST
Update -
Microsoft has confirmed they are currently seeing a spike in authentication failures when retrieving container images from their registry service. They have made the following statement:
We are actively investigating customer alerts of 401 authentication errors when pulling images from mcr.microsoft.com. We’ve identified a potential underlying factor related to a recent update made to a backed service and we are actively working on determining mitigation workstreams. More information will be provided shortly. - 23:04 UTC on 15 June 2026
Their engineers are currently investigating and we are awaiting further updates from their support team.
Jun 16, 09:19 AEST
Update -
We are continuing to experience performance degradation on all hosting clusters. This is specifically related to intermittent failures in retrieving container images in Azure.
Currently, this is impacting the systems scalability and subsequently causing slowness and performance degradation.
Our engineering teams are actively investigating and working towards a resolution. We will continue to provide updates as more information becomes available.
Jun 16, 09:01 AEST
Update -
Following our earlier update regarding system slowness on AURPD06 and AURPD09, we are specifically seeing intermittent failures retrieving container images in Azure.
This is impacting service scalability and may result in errors when accessing Sentral or moving through the system.
Our engineering teams are actively investigating and working towards a resolution. We will continue to provide updates as more information becomes available.
Jun 16, 08:55 AEST
Identified -
We have identified system slowness and performance degradation on AURPD06 and AUPRD09. This may impact your ability to login or navigate through Sentral. We are currently working on a solution and will provide an update by 9am.
Jun 16, 08:42 AEST