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I cannot connect to the Windows-based computer.
- Make sure that Terminal Services or Remote Desktop Services is enabled on
your Windows-based computer.
- You can open only one session on the Windows-based computer at a time.
- If you cannot connect to a Windows-based computer using the computer name,
you can also try the fully qualified name. For instance, if your computer is
named MyPC, and it is connected to a network called microsoft.com, enter
MyPC.microsoft.com.
- Make sure the computer you are trying to connect to is connected to the
network. If your network is protected by a firewall, check with your system
administrator to determine which network port is configured to permit
connections. Network port 3389 is the default port used by the Remote
Desktop Protocol, but any open port can be used.
- If you are connecting to a Windows-based computer with a name that
contains extended characters such as accented Roman characters or Japanese
characters, use the IP address for the Windows-based computer (for example,
192.168.255.255) to connect. Remote Desktop Connection Client for Mac cannot
connect by using computer names that contain extended characters.
- If you were previously connected to the Windows-based computer, and
disconnected instead of logging off, network policies might restrict reconnection
to disconnected sessions for some or all connections
to the Windows-based computer. For more information, contact your system administrator.
Related topics
Configure Windows to accept Remote Desktop connections
I cannot open a connection settings file.
Connect to a specific network port