There are no logs of failed attempts, they never reach the Mac.
As you should know, you have to login on the mobile app using your email and password to access the Mac, a failed attempt would be using the wrong password while logging in to the cloud PA service and that never reaches the computer. That's the same as someone trying to log in to your webmail account by trying different passwords, you never know about it.
About common sense:
Common sense is to not make too many assumptions, common sense would be to not assume this question would be related to Parallels Access since this isn't the Parallels Access forum. Also, common sense tells that the more relevant information you give the better will be the quality of the reply, and everyone loses less time going back and forth even if it takes longer to type on a mobile phone the first time.
Last edited: Sep 12, 2014