IIS FTP TROUBLESHOOTING

For IIS FTP Log Troubleshooting, we can refer to the URL as below:

https://support.microsoft.com/en-ca/help/969061/the-ftp-7.0-status-codes-in-iis-7.0
https://support.microsoft.com/en-us/help/173054/file-time-stamp-mismatch-using-ftp-client
https://en.wikipedia.org/wiki/List_of_FTP_commands

https://www.iis.net/configreference/system.applicationhost/sites/site/ftpserver/logfile