Connect to your server via Remote Desktop
Click simultaneously on the Windows logo + R to open the “Run” dialog and execute the “cmd” command
Open the registry editor by typing the “regedit” command
Search for this registry subkey:
Double-click or right-click on the “PortNumber” registry subkey, select the decimal base and type the port number of your choice (the default port is 3389, in this example, we selected port 3390). Click on “Ok” to save your selection.
IMPORTANT: Make sure that remote access to your server through the new port is authorized in your Windows firewall before executing the next step.
Exit the registry editor
Restart your server
After the reboot, specify the Remote Desktop port number.
Open IIS Manager and navigate to the level you want to manage. For information about opening IIS Manager, see Open IIS Manager (IIS 7). For information about navigating to locations in the UI, see Navigation in IIS Manager (IIS 7).
In the Connections pane, click Sites.
In Features View, select the site for which you want to enable trace logging.
In the Actions pane, under Configure, click Failed Request Tracing.
In the Edit Web Site Failed Request Tracing Settings dialog box, select Enable to enable logging for this site.
In the Directory text box, type the path where you want to store the log files or click the browse button (…) to find a location on the computer. The default is %SystemDrive%\inetpub\logs\FailedReqLogFiles.
As a best practice, log files, such as log files for failed request tracing, should be stored in a directory other than systemroot.
In the Maximum number of trace files text box, type the maximum number of trace log files that you want to keep, and then click OK.
How to set up stats for web site in IIS
You should be able to check the Event Viewer and go through the Security section to see the Audit Successes and Failures for logins. If you are on the general tab, there is a box at the top (which you have to scroll through) that would say why it failed if it was a Failure and lower in that box it would say the source network address and the workstation name that was connecting.
To view the RDP logins:
Event Viewer > Applications and Services logs > Microsoft > Windows > TerminalServices-RemoteConnectionManager > Operational