I have a client with Exchange 2010 that receives SecureEnvelope.html¿ attachments that when open redirects to a secure email web portal. This works fine with outlook but a hand ful of users do not come onsite and uses OWA. Somehow OWA is stripping the content of the html attachment and keeping it from redirecting.
I have tried playing around with the Computer File Access tab under OWA properties, but was not successful. Any help is appreciated!