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The expiresOn shared access signature (SAS Key) property specifies:
expiresOn
When the SAS key becomes invalid.
When the uploaded file will be deleted from the server.
When the user's browser authentication cookies will be deleted.
For a web application that lives in the example.org domain to access resources in the contoso.com domain, you need to enable:
HTTPS
CORS
Shared access signatures
If you want your web app users to upload images to your Azure Blob Storage account, you will:
Grant them access by sharing your Azure Blob Storage account key.
There is no way to grant third parties access to your Azure Blob Storage account.
Create a shared access signature that grants restricted access to your Blob Storage account.
You must answer all questions before checking your work.
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