And once again extremely fast log file growth in the Exchange environment. I had this problem once before, when it was iPhones with the iOS bug. This time, however, there were no affected iPhones to be found.
Exchange 2010: Extremely fast log file growth (from the life of an admin)
In this case, the Exchange User Monitor helped me to identify a user who was causing the problem. After the Outlook profile was recreated, everything was back to normal.
The Exchange User Monitor can be downloaded here:
http://www.microsoft.com/en-us/download/details.aspx?id=11461
The "CPU (%)" column was important for the analysis in this case
I always keep an eye on the log files now, using the "Bean Counter" which can be downloaded here:
http://gallery.technet.microsoft.com/exchange/Bean-Counter-An-Exchange-41448e46
Works great, I have made a small Excel table from the data of the mail from Bean Counter so that you can see it directly at first glance. Bean Counter sends a mail with the generation rate of the log files every half hour:
I then made this Excel folder from it:
Now you can quickly see that a database is still "somewhat" out of control 
