Leave unchanged if you are using the public Microsoft Azure cloud.
If you are using a private or other Azure cloud service, enter the resource manager endpoint URL for that cloud.
You can get this information from the Azure portal.
Here's a list of commonly used values:
Azure China: https://management.chinacloudapi.cn/
Azure US Government: https://management.usgovcloudapi.net/
Azure Germany: https://management.microsoftazure.de/