Have an issue with Exchange 2010 SP1 Rollup 8 and OWA. Some pc's running Windows 7 have had an issuewhen S/MIME failed causingthem to be kicked out of OWA every time they click New/Reply email.To fix this we sign on to OWA and go into'All Options','Settings', 'S/MIME' and 'Reinstall the S/MIME control'. Now these systems no longer show attachments when they are added to new/reply emails. However, if the user saves the email to draft, closes it,then goesto the draft folder to reopen the emailthe attachment is present and displays. Downloading the S/MIME control on a system that isn't having the original issue causes the attachments not to show on add. Uninstalling the download re-creates the original issue with New/Reply and they are kicked out of OWA.
Disabling S/MIMEfor OWA via theExchange Management Console/Server Configuration/Client...