Using Remote Web Workplace to connect a remote computer to a client computer results in an error message before the connection is established.
The client computer you are connecting to must be running Microsoft Windows XP or later.
Cause: The client computer may not be turned on.
Solution: Verify that the client computer is powered on and connected to the Windows Small Business Server network.
Cause: Remote Desktop connections may not be enabled on the client computer.
Solution: Verify that Remote Desktop is enabled on the computer you are connecting to.
To complete the following procedure, you must be logged on as a member of the Domain Admins security group.
To enable Remote Desktop
Click Start, click Control Panel, click Performance and Maintenance, and then click System.
On the Remote tab, select the Allow users to connect remotely to this computer check box.
Ensure that you have the proper permissions to connect to your computer remotely, and then click OK. You must be an administrator or a member of the Remote Desktop Users group to connect remotely to your computer.
Verify that Remote Desktop is enabled by creating a Remote Desktop connection from another computer on the Windows Small Business Server network, and then attempting to connect to your computer. To start Remote Desktop, click Start, point to All Programs, point to Accessories, point to Communications, and then click Remote Desktop Connection.
If you are running any firewall software on the client computer, ensure that it is not blocking access to port 3389 (the port specific to Remote Desktop Connections). For more information, see the firewall manufacturer's documentation.
Cause: The remote computer may have reached the maximum number of allowed connections.
Solution: Verify that the computer you are connecting to has not reached the maximum number of allowed connections. If you are connecting to a computer running Windows XP Professional, only one user can be connected at a time. If you are connecting to an application sharing server, connections are determined by the number of client access licenses (CALs) purchased by your company. For more information, see your administrator.
Cause: Firewall settings may be blocking port 4125.
Solution: Verify that port 4125 (the port specific to the Remote Web Workplace) is open to the Internet on the computer running Windows Small Business Server. If you ran the Configure E-mail and Internet Connection Wizard, and chose to publish the Remote Web Workplace, this is configured automatically on the server. If you have a router or firewall device that does not support UPnP, you must manually configure this device to accept Internet traffic through port 4125. For more information, see the device manufacturer's documentation.
If the computer running Windows Small Business Server is running Microsoft Internet Security and Acceleration (ISA) Server, run the Configure E-mail and Internet Connection Wizard, choose to publish the Remote Web Workplace, and ISA Server will be automatically configured to allow Remote Desktop connections.
If you are connecting from a remote computer that accesses the Internet through ISA Server, the person responsible for ISA Server must create a protocol rule allowing outbound traffic through port 4125. You must also install ISA Firewall Client on the remote computer.
Verify that your Internet service provider (ISP) is not blocking Internet traffic through port 4125.