After installing the latest update of Chrome (currently version 37), you find several features within Outlook Web App (OWA) to be no longer functioning.

Some of these features are:

 

This is due to the removal of showModalDialog since Chrome 37.

More Information with Workaround:

http://www.msoutlook.info/question/owa-broken-chrome-37

Google Chrome Forum:

https://productforums.google.com/forum/#!topic/chrome/F180I4IS77k

MIT Knowledge Base:

http://kb.mit.edu/confluence/display/istcontrib/Attachments+in+OWA+on+Chrome+v.+37

Fix applied for domain computer:

http://www.bugdebugzone.com/2014/08/sitecore-modal-pop-ups-are-not-working.html