Janusseal for Outlook - Specifications

Current release

The current release of Janusseal for Outlook is 3.4.0.


Email Clients
  • Microsoft Office365
  • Microsoft Outlook 2019
  • Microsoft Outlook 2016
  • Microsoft Outlook 2013
  • Microsoft Outlook 2010

(32 and 64 bit in all above platforms where relevant)

Client Platforms
  • Microsoft Windows 10
  • Microsoft Windows 8.1
  • Microsoft Windows 7
Email Servers
  • Office 365 / Exchange Online
  • Microsoft Exchange Server

Protective Markings/Classifications

Applied to Outlook items

  • Messages
  • Meeting Requests
  • Task Requests
  • Posts

Applied as

  • Internet message extension header (X-Protective-Marking)
  • Subject line marking
  • Native (Outlook user property) marking
  • Start of message body (prepend) including arbitrary text
  • End of message body (append) including arbitrary text

Compliant with CoCo (UK PSN), Email Protective Marking Standard (Australian Government) 2018.1, and prior, and completely configurable to any other standard. Ability to apply other protective marking forms in subject line and Internet message extension header.

Administration and Management


  • Installation package (.MSI) ready to deploy
  • Administrative Template File (.ADM) for Group Policy management
  • Administration Guide


  • Active Directory Group Policy
  • SCCM

Configuration: Group policy can be applied to users and/or machines, using Windows Domain infrastructure

  • Organisation Units
  • Security Groups
  • WMI Filters

End of support for previous releases

Support for Janusseal for Outlook 3.2 ends 31 March 2019
Support for Janusseal for Outlook 3.1 ended 31 January 2018
Support for Janusseal for Outlook 3.0 ended 30 September 2016
Support for Janusseal for Outlook 2.x ended 30 September 2016