Microsoft says network capacity upgrade caused outage; root cause fixed

The notable part is the disclosure gap: Microsoft has named a cause and declared a fix but left the scope of impact undefined, which makes it hard to judge whether this is routine maintenance fallout or something with wider reach across dependent services. For anyone relying on Microsoft-hosted infrastructure, the practical question is less the root cause than how recovery is progressing and whether the capacity-upgrade process itself needs revisiting. Whether the company later details affected services and user counts is the open question.