You can use the Azure portal to find known Azure service issues or to see any upcoming planned maintenance.
After signing into your Azure tenant, search for Service Health.
From here you can find the following information:
1. Service issues - Current problems in the Azure services
2. Planned maintenance - Upcoming maintenance that could affect the availability for your services in the future.
3. Health advisories - Changes in Azure services that require your attention such as features being deprecated or items requiring an upgrade.
4. Security advisories - Security related notification or violations that may affect the availability of your Azure services
You can use the filter options to narrow down the information displayed by scope, subscriptions, regions, or even specific Azure services.
Health Alerts
You can configure Health alerts to notify you by email, text message or webhook notifications when your Azure resources are impacted by service issue. These can be created under Health Alerts and then click create.
More information
This feature is in the process of being updated. You can find more information in the following Microsoft articles. Below are articles for the classic version and the newer version depending on which one is active on your tenant.
Updated experience: https://learn.microsoft.com/en-us/azure/service-health/service-health-portal-update
Classic experience: https://learn.microsoft.com/en-us/azure/service-health/service-health-overview