Copy files based on content command line utility
I have a list of more than 10,000 excel files in location A. I need a free utility (preferably a command line utility since I need to use windows task scheduler to run this every x minutes) which will scan these files and search for a particular string/content in the file. The file should also be created/modified after a specific date. If the file meets these criteria then it must be copied in Location B. I found a free program called Ultrafile Search which managed to identify the files but it does not run with parameters etc so i cannot use it in the scheduler. I also tried WinGrep but it freezes continuously.