When using an Azure WebApp (a.k.a. Application Service) behind an Application Gateway with the default document set correctly, visiting example.com/path/ works but example.com/path without the trailing slash brings up the blue 403 error.
If you take a Microsoft Azure course you may be given a limited-time Azure Subscription to help your learning. This post shows how to check the usage of that allowance so you can make the most of it before having to revert to your personal paid-for account.
Azure WebApps (depending on tier) come with an optional native backup service. This quick PowerShell snippet looks at all the WebApps in the current subscription and reports back on whether Backup has been set up. This should be helpful for spotting where a configuration has been missed.