What causes downtime or server errors for websites hosted on Microsoft Azure?

Websites hosted on Microsoft Azure may encounter downtime resulting from service disruptions, configuration errors, or resource limitations. To support proactive monitoring and rapid resolution, Microsoft provides official tools such as Azure Service Health and the Azure Status Page. These resources enable administrators to track outages, planned maintenance, and performance issues, ensuring timely identification and remediation of potential problems.

https://learn.microsoft.com/en-us/azure/service-health/overview