I am working on SharePoint app model with office 365. I had created a Auto-Hosted app in Visual Studio 2013 and trying to debug this app but I have faced a lot of issues in this process. I have tried to so the same in another environment (from home) and I am able to debug the same app so I have only one option to lodged a support ticket to Microsoft for the same, MS has checked my environment and came to know that few of URL and IP's is blocked on my office network. Microsoft has suggested to open that URL (white list) in network firewall. Microsoft has provided an article and the same is describe below. SharePoint Online URLs and IP Addresses IT administrators might want to control communication to specific SharePoint Online sites through an on-premises firewall. To do this, you’ll need to know the IP address ranges used by SharePoint Online. Outgoing IP Address Ranges Ports in your on-premises firewall might need to be opened to accept network traffic originating fro...
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