It appears there are two outages, from https://azure.status.microsoft/en-gb/status:

> We are aware of an issue that started on July 18, which resulted in customers experiencing unresponsiveness and startup failures on Windows machines using the CrowdStrike Falcon agent, affecting both on-premises and various cloud platforms (Azure, AWS, and Google Cloud).

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> It’s important to clarify that this incident is separate from the resolved Central US Azure outage (Tracking Id: 1K80-N_8). Microsoft is actively providing support to assist customers in their recovery on our platforms, offering additional guidance and technical assistance.