How to find out if user logged in to Exchange OWA?

1. please download Microsoft Log Parser 2.2 and install

Download: http://www.microsoft.com/en-us/download/details.aspx?id=24659

2. Copy your log files from C:\inetpub\logs\LogFiles\W3SVC1, to C:\log\ and merge them into one big log file using following command:

logparser.exe -i:iisw3c "select * into c:\log\merge.log from C:\Tools\W3SVC1\*" -o:csv

3. Get OWA logins using following command:

logParser -i:csv "SELECT cs-username, date, time, c-ip, cs-uri-stem, cs(User-Agent) FROM C:\log\merge.log TO C:\log\Output.csv WHERE cs-method LIKE '%get%' and cs-uri-stem LIKE '%owa%'