Which port needs to be open for users to map a drive to an Azure file share from Windows 10?

To map a drive to an Azure file share from Windows 10, port 445 must be open. This port is used for SMB (Server Message Block) protocol, which is required for accessing Azure file shares. Azure file shares support SMB 3.0, which allows clients to use SMB over the internet.

When users attempt to map a drive to an Azure file share, their Windows operating system communicates using SMB over TCP, specifically through this port. If port 445 is blocked, the SMB connection cannot be established, preventing users from successfully mapping the drive.

Other ports, such as 80 and 443, are typically used for HTTP and HTTPS traffic, which are not relevant for SMB operations. Port 3389 is dedicated to Remote Desktop Protocol (RDP), used for remote desktop connections, and does not apply in the context of mapping drives to file shares. Hence, only port 445 is necessary for the specific task of mapping an Azure file share.