Trying mount Azure File Share to local box net use T: \test...\share /u:AZURE\test..... AccountKey==
getting System error 53 has occurred.
The network path was not found.
445 TCP is open as recommended for outside azure connections. From Azure VM able to connect with exactly same approach
Your ISP also could block port 445. Please refer to this link.
To see the summary of ISPs that allow or disallow access from port 445, go to TechNet.
You could use PortQry.exe to check it.
PortQry.exe -n [storage account name].file.core.windows.net -p TCP -e 445
If your ISP block port 445, you could create a VPN connection, please refer to this answer.