DavMail is a great tool that will help you use IMAP with Outlook Web Access. On the downside I just noticed that DavMail’s logfile was 5.7GB. You should better keep an eye on
C:\Users\<user>\AppData\Local\VirtualStore\Program Files\DavMail\
It seems the logs are not compressed and never deleted…… I will submit a bug report to the team :(