I need to use timestamp that looks like (YYYY-MM-DDTHH:MM:SSZ) ex: 2015-02-17T18:57:13Z. Is it possible to use the currentMilliSeconds and convert that timestamp to a customized format? If not, would you recommend a solution to end up with such a timestamp?
You can easily create a date variable with such format in NeoLoad. Go to the Variable manager and create a "Date" variable.
In the date pattern field use that pattern: yyyy-MM-dd'T'hh:mm:ss'Z'
You can check the format result by using the "Test" button in the variable manager panel.