The same experience with 'pure' Office 2016 Pro package. 32bit without problém and with 圆4 same error signing message. Only cannot sign any message.ĭeinstalling Office365 圆4 and installing 32bit version solved problem. When receiving signed message from other users, everything is O.K. Was not successful because of an unspecified error.' and message is not sent.
After Office365 installation (2016) and Outlook configuration, all things seems to be fine, but when trying to send digitally signed message to anyone (we have our internal certificates from internal MS CA) following message appears: 'A required action
