Why is it impossible to enter a username/password to create a Windows Monitor?

NeoLoad uses the Perfmon API to monitor Microsoft application. This API does not provide the option to set a specific username/password. By default, the current logged in user will be used to connect to the target server.

If the current user account does not have the appropriate rights, run the Controller using the appropriate account by right-clicking on NeoLoadGUI.exe and using the Run as option

Another way is to create a network drive from the NeoLoad Controller to your target server with a user that has sufficient rights on the target server to monitor.

For example, you can run the following command from the NeoLoad Controller.

net use \\192.168.1.1 /user:domain1\user1 Password1

192.168.1.1 is the IP address of the server you want to monitor.
user1/Password1 are the credentials of the user who has sufficient rights to monitor your target server.

For more information, see Microsoft monitors.